In this experiment, Jared teaches us about sound and light waves using a physical model of a wave, and an online learning tool from PhET. You can try out this learning tool by clicking on this link: https://bit.ly/2vJJ1I6 Are you a teacher? Click this link for free teaching resources related to this topic: https://sites.google.com/temple.edu/funscience/home You can learn more about sound and light waves at https://bit.ly/2KeayY6. It's a link to our companion website new.learningscience.org/wp where you'll find lots of fun, interactive science sites for kids. Check out more videos like this on our channel FunScienceDemos, and do not forget to subscribe and click the bell to stay updated on new videos! https://bit.ly/16zEpWc
Views: 175740 funsciencedemos
www.woub.org/spacedout This episode focuses on the transfer of energy by waves. Students will be intrigued with the power of energy waves as they view demonstrations not easily replicated in a typical classroom. They are provided examples of energy waves and are drawn into a discussion on a couple of ways to observe that energy is being transferred by a wave. Spaced Out: A Cosmic Scene Have you ever questioned how astronomers and physicists know so much about the Universe? Can you explain and demonstrate how light and sound waves carry energy? Spaced Out: A Cosmic Scene tackles these questions and many more in a humorous and entertaining fashion while conveying insights into the study of astronomy and the physics of waves. Spaced Out: A Cosmic Scene is a Science, Technology, Engineering and Mathematics (STEM) project funded by eTech Ohio and produced by the WOUB Center for Public Media at Ohio University, Athens. This web-based multimedia project consists of eight science and mathematics student video-on-demand modules for at-risk students in grades 8-10, and includes eight teacher self-study video support modules with assessment strategies. All content is aligned with the Ohio Academic Content Standards for physics and astronomy. The student modules are designed to stimulate and inculcate higher order thinking skills, innate curiosity, and inquiry-based learning. Each student module focuses on specific key concepts: waves carry energy; waves transfer energy; size of the cosmos; measuring distances in space; scale modeling of the solar system; predictable motion of the earth and moon; stellar finger print; brief history of astronomy; and, the formation of all the elements. Intended to be utilized both independently by students with teacher oversight, and as a teaching-learning experience for an entire class, Spaced Out: A Cosmic Scene will entice and motivate even the most reluctant students to dig into astronomy, physics and mathematics content with enthusiasm. The accompanying teacher modules for each episode of Spaced Out: A Cosmic Scene illustrate how key concepts may be taught, connections to the standards, and assessment strategies; expand on the materials in the student video, pointing out subtle points that might be missed or are not brought out in the student video; provide suggestions on how to incorporate the student video into daily classroom instruction; and, make connections to mathematics applications. In addition, the teacher modules are the link to curriculum resources - numerous curriculum links identify multiple web-based resources, which provide educators with further background information on the key concepts and student lessons suggestions for the classroom. As one teacher who participated in the development of the project noted, "When I was a new teacher I struggled to find good, interactive resources to share with my students. This project has a wealth of information for teachers to share with their students and it includes assessments to evaluate their learning progress." Spaced Out: A Cosmic Scene builds on the notion that we learn science by doing science!
Views: 31590 woubpbs
This Eureka.in Physics video shows how sound travels through the various states of matter, significance of Vibrations in the traveling of sound energy and the various type of sound waves. It also discusses about the measurement of sound and the concept of echo. You can also download our free app that covers all this and a glossary of key terms, and a quiz to test your knowledge on this topic here: http://bit.ly/14ttWKA Visit us at http://www.designmate.com For fun and educational updates, like us on Facebook: https://www.facebook.com/Designmate.Eureka Designmate Eureka is a unique channel that has Science & Mathematics videos from our Award winning K-12 product Eureka.in. These videos are available in multiple languages. If you would like to view more of our Videos or have a look at any specific topic do leave a comment.
Views: 1368435 Designmate Pvt. Ltd. - Official
Get Your Crash Course Physics Mug here: https://store.dftba.com/products/crashcourse-physics-mug Waves are cool. The more we learn about waves, the more we learn about a lot of things in physics. Everything from earthquakes to music! Ropes can tell us a lot about how traveling waves work so, in this episode of Crash Course Physics, Shini uses ropes (and animated ropes) to talk about how waves carry energy and how different kinds of waves transmit energy differently. -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 721836 CrashCourse
The way light behaves can seem very counter intuitive, and many physicists would agree with that, but once you figure out light waves it all starts to make more sense! In this episode of Crash Course Physics, Shini shows us how we know that light exists as a wave and why that's really cool! Want more Crash Course in person? We'll be at NerdCon: Nerdfighteria in Boston on February 25th and 26th! For more information, go to http://www.nerdconnerdfighteria.com/ *** Get your own Crash Course Physics mug from DFTBA: http://store.dftba.com/products/crash... The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list... -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 468482 CrashCourse
ScienceMan.com provides free digital lessons and technology integration help for teachers and students. In this digital lesson, ScienceMan discusses how sound waves travel from place to place. ScienceMan™ and ScienceMan Digital Lessons are protected by copyright. All rights reserved.
Views: 97096 ScienceMandotcom
The best and the biggest channel for science videos for kids. Kindergarten,preschoolers ,primary school kids can learn about the basics of sound with help of this animated education video. How sound is produced, how sound travels,what are sound waves and what are vibrations, all elementary questions are answered in an interesting and creative way.
Views: 653361 makemegenius
All waves can transfer energy from one place to another without transferring any matter. This is done by a series of disturbances or vibrations that carry the energy. Just like the people in their seats, only moving up and down when it’s their turn. Waves can transfer energy through solids, liquids, gases and empty spaces – otherwise known as vacuums. There are two types of waves – which we will look at in more detail in another video, but the basic features are the same. The frequency of a wave is the number of complete waves passing a fixed point in a given amount of time. This time period is usually one second. Frequency is given the symbol f and is measured in units called Hertz. Hertz measure how many complete cycles per second; so how many people in our Mexican wave stand up every second. The frequency and period are often confused. The frequency refers to how often something happens, whereas the period refers to the time it takes to happen. The period of a wave is the time for one complete cycle. So the time taken for one person to stand up, wave and sit down. This would be measured in seconds. When something happens repeatedly we say that the event is periodic and refer to the time for the event to repeat itself. The period of the earth to orbit the sun is 365 days, the period of a day is 24 hours, the period of a typical class at school is 45 minutes. Now for the wavelength… the wavelength is the distance between a point on one wave and the same point on the next wave, for example two peaks or two troughs. Wavelength is given the symbol Lambda from the Greek letter, and is usually measured in metres. Wavelengths can vary hugely in size, x-rays are very short, visible light is here and FM radiowaves are much longer. So we’ve looked at the frequency, period and wavelength so far. Let’s finish with amplitude. As waves travel, they create disturbance. The amplitude of a wave is the distance from the maximum disturbance to its undisturbed position. Think of a very flat sea… and then an incoming wave. The amplitude is the height of the top of the wave from the flat sea. In another video we’ll be looking at the wave speed equation, and connecting wavelengths and frequencies: Wave Equation For now you just need to know what these 4 keys words mean. Frequency, period, wavelength, amplitude SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Find all of our Chemistry videos here: https://www.youtube.com/watch?v=cRnpKjHpFyg&list=PLW0gavSzhMlReKGMVfUt6YuNQsO0bqSMV Find all of our Biology videos here: https://www.youtube.com/watch?v=tjkHzEVcyrE&list=PLW0gavSzhMlQYSpKryVcEr3ERup5SxHl0 Find all of our Maths videos here: https://www.youtube.com/watch?v=hJq_cdz_L00&list=PLW0gavSzhMlTyWKCgW1616v3fIywogoZQ Twitter: https://twitter.com/fuseSchool Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us: http://www.youtube.com/fuseschool Friend us: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: [email protected]
Views: 83726 FuseSchool - Global Education
Introduction to transverse and longitudinal waves. Created by Sal Khan. Watch the next lesson: https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/mechanical-waves/v/amplitude-period-frequency-and-wavelength-of-periodic-waves?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/magnetic-forces-and-magnetic-fields/magnetic-flux-faradays-law/v/faradays-law-for-generating-electricity?utm_source=YT&utm_medium=Desc&utm_campaign=physics Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 972719 Khan Academy
114 - Traveling Waves In this video Paul Andersen explains how traveling waves move through space and time. The reflection and interference of traveling waves can create standing waves which appear motionless. Examples of traveling waves in one and two dimensions are included. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: Adjwilley. English: The Sum (blue) of Two Sine Waves (red, Green) Is Shown as One of the Waves Increases in Frequency. The Two Waves Are Initially Identical, Then the Frequency of the Green Wave Is Gradually Increased by 25%. Constructive and Destructive Interference Can Be Seen., February 4, 2013. Own work. http://commons.wikimedia.org/wiki/File:WaveInterference.gif. “Interference (wave Propagation).” Wikipedia, the Free Encyclopedia, April 3, 2015. http://en.wikipedia.org/w/index.php?title=Interference_(wave_propagation)&oldid=654718966. Rowley, Jeff. 30 March 2012, March 30, 2012. Jeff Rowley Big Wave Surfer 2012 Finalist Billabong XXL Big Wave Awards Ride of Year Xvolution Media. http://commons.wikimedia.org/wiki/File:Jeff_Rowley_Big_Wave_Surfer_2012_Finalist_Billabong_XXL_Big_Wave_Awards_Ride_of_Year_Xvolution_Media_-_Flickr_-_Jeff_Rowley_Big_Wave_Surfer.jpg. Shacktown123. English: Jeff Rowley, Big Wave Surfer and Professional Athlete Charges Jaws Peahi Solo on Thanksgiving 2012 on His Channel Islands 12 Footer Gun, December 23, 2012. Own work. http://commons.wikimedia.org/wiki/File:Jeff_Rowley_Jaws_Peahi_Maui_Paddle_In_Big_Wave_Surfing_Red_Bull_Jaws_9.jpg. “Wave on a String.” PhET. Accessed April 20, 2015. https://phet.colorado.edu/en/simulation/wave-on-a-string.
Views: 41198 Bozeman Science
http://www.facebook.com/ScienceReason ... [email protected]: EMS Electromagnetic Spectrum (Episode 2) - Radio Waves The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. --- Please SUBSCRIBE to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker --- MEASURING THE ELECTROMAGNETIC SPECTRUM The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes - visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. • http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html --- RADIO WAVES Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Like all other electromagnetic waves, they travel at the speed of light. Naturally-occurring radio waves are made by lightning, or by astronomical objects. Artificially-generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, satellite communication, computer networks and innumerable other applications. Different frequencies of radio waves have different propagation characteristics in the Earth's atmosphere; long waves may cover a part of the Earth very consistently, shorter waves can reflect off the ionosphere and travel around the world, and much shorter wavelengths bend or reflect very little and travel on a line of sight. Discovery and utilization: Radio waves were first predicted by mathematical work done in 1865 by James Clerk Maxwell. Maxwell noticed wavelike properties of light and similarities in electrical and magnetic observations. He then proposed equations, that described light waves and radio waves as waves of electromagnetism that travel in space. In 1887, Heinrich Hertz demonstrated the reality of Maxwell's electromagnetic waves by experimentally generating radio waves in his laboratory. Many inventions followed, making practical the use of radio waves to transfer information through space. Propagation: The study of electromagnetic phenomena such as reflection, refraction, polarization, diffraction and absorption is of critical importance in the study of how radio waves move in free space and over the surface of the Earth. Different frequencies experience different combinations of these phenomena in the Earth's atmosphere, making certain radio bands more useful for specific purposes than others. Radio communication: In order to receive radio signals, for instance from AM/FM radio stations, a radio antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune in to a particular frequency (or frequency range). This is typically done via a resonator (in its simplest form, a circuit with a capacitor and an inductor). The resonator is configured to resonate at a particular frequency (or frequency band), thus amplifying sine waves at that radio frequency, while ignoring other sine waves. Usually, either the inductor or the capacitor of the resonator is adjustable, allowing the user to change the frequency at which it resonates. In medicine: Radio frequency (RF) energy has been used in medical treatments for over 75 years generally for minimally invasive surgeries and coagulation, including the treatment of sleep apnea. • http://en.wikipedia.org/wiki/Radio_waves .
Views: 396660 Best0fScience
http://www.facebook.com/ScienceReason ... [email protected]: EMS (Episode 1) - An Introduction To The Electromagnetic Spectrum --- Please SUBSCRIBE to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker --- Measuring the electromagnetic spectrum You actually know more about it than you may think! The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes-- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. The different types of radiation in the EM spectrum, in order from lowest energy to highest: Radio: Yes, this is the same kind of energy that radio stations emit into the air for your boom box to capture and turn into your favorite Mozart, Madonna, or Justin Timberlake tunes. But radio waves are also emitted by other things ... such as stars and gases in space. You may not be able to dance to what these objects emit, but you can use it to learn what they are made of. Microwaves: They will cook your popcorn in just a few minutes! Microwaves in space are used by astronomers to learn about the structure of nearby galaxies, and our own Milky Way! Infrared: Our skin emits infrared light, which is why we can be seen in the dark by someone using night vision goggles. In space, IR light maps the dust between stars. Visible: Yes, this is the part that our eyes see. Visible radiation is emitted by everything from fireflies to light bulbs to stars ... also by fast-moving particles hitting other particles. Ultraviolet: We know that the Sun is a source of ultraviolet (or UV) radiation, because it is the UV rays that cause our skin to burn! Stars and other "hot" objects in space emit UV radiation. X-rays: Your doctor uses them to look at your bones and your dentist to look at your teeth. Hot gases in the Universe also emit X-rays . Gamma-rays: Radioactive materials (some natural and others made by man in things like nuclear power plants) can emit gamma-rays. Big particle accelerators that scientists use to help them understand what matter is made of can sometimes generate gamma-rays. But the biggest gamma-ray generator of all is the Universe! It makes gamma radiation in all kinds of ways. • http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html .
Views: 1250529 Best0fScience
Wave Motion is the method of energy transfer from one point to another without bulk transfer of matter. What this means is that in wave motion energy is transferred from one point to another but matter does not move from one point to another. One example of wave motion is the motion of sound waves when we speak. The sound energy is transferred from our mouth to the ear of the listener but the air particles which transmit the sound do not move from our mouth to the ear. Only the energy moves as the air particles vibrate. Another example of wave motion is the creation of a ripples in a pond when a stone is dropped in it. Water does not travel from the center of the ripple-circles to the periphery radially. Only the energy imparted by the pebble to the water travels radially outwards. So if we place a leaf in the water, it will not move radially outwards with the ripples. It will simply bob up and down because the water particles only vibrate, they don't move radially. There are 2 types of waves: (i) Non-mechanical Waves These waves are also known as electro-magnetic waves. These do not need material medium to travel through. This means that energy can be transferred from one point to another without there being any particles in between. Sound waves are not electromagnetic waves because they require air/water/steel etc particles to travel. Electromagnetic waves can travel through space. Light waves, radio waves and infra-red waves are examples of electro-magnetic waves. We can feel the heat from the sun because heat waves are electromagnetic and can travel through space. (ii) Mechanical Waves These are waves that exist in a material medium having inertia and elasticity. Energy is transferred in this case, by the vibration of medium particles. For instance, when we speak, the air particles near our mouth vibrate. These air particles cause some other nearby air particles to vibrate -- and soon a disturbance is setup which gets transmitted by the vibration of air particles. In case of all mechanical waves the energy disturbance propagates through periodic motion of medium particles about a mean position. A wave motion which progresses onwards through the medium, with energy transferred across every section of it, is called a traveling or progressive wave. Mechanical waves are of 2 different types: (a) Transverse Waves In case of transverse mechanical waves the medium particles vibrate perpendicular to the direction of transfer of energy. So if energy is being transferred from left to right, the particles move up and down. (b) Longitudinal Waves Are waves in which particles vibrate in a direction parallel to the direction of energy transfer. The energy is transferred through compressions and rarefactions that are created when the particles oscillate about their mean positions. This picture better denotes how longitudinal waves are transmitted. To read complete description and view complete video, log on to http://www.topIITcoaching.com
Views: 18648 topiitcoaching
This physics video tutorial explains how to calculate the wave speed / velocity on a stretch string given an applied tension and linear density of the wire. It also discusses the wave intensity as a function of source power and distance in addition to its relationship to the inverse square law. It covers topics such as period, frequency, and amplitude of a wave. This video contains plenty of examples and practice problems. Here is a list of topics: 1. Transverse and Longitudinal Waves 2. Intensity, Amplitude, and Frequency 3. Sound Waves - Compression vs Expansion / Rarefaction 4. High and Low Pressure Regions of Sound Waves 5. Water Waves and Waves on a String 6. Wave Speed on a Stretched Spring 7. Tension Force and Linear Density - Mass Per Unit Length 8. Energy in Wave Motion 9. Wave Intensity, Power, and Distance 10. Inverse Square Law - Intensity and Distance 11. Crest vs Trough of Sinusoidal Wave 12. Period, Frequency, Wavelength, Amplitude and Wave Velocity Calculations 13. Velocity and Tension Force of Spring 14. Principle of Superposition 15. Constructive vs Destructive Interference
Views: 32861 The Organic Chemistry Tutor
http://www.facebook.com/ScienceReason ... [email protected]: EMS Electromagnetic Spectrum (Episode 3) - Microwaves Electromagnetic radiation which has a longer wavelength (between 1 mm and 30 cm) than visible light. Microwaves can be used to study the Universe, communicate with satellites in Earth orbit, and cook popcorn. --- Please SUBSCRIBE to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker --- Measuring the electromagnetic spectrum You actually know more about it than you may think! The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes -- visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. • http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html --- Microwaves are electromagnetic waves with wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently, with frequencies between 300 MHz (0.3 GHz) and 300 GHz. This broad definition includes both UHF and EHF (millimeter waves), and various sources use different boundaries. In all cases, microwave includes the entire SHF band (3 to 30 GHz, or 10 to 1 cm) at minimum, with RF engineering often putting the lower boundary at 1 GHz (30 cm), and the upper around 100 GHz (3mm). Apparatus and techniques may be described qualitatively as "microwave" when the wavelengths of signals are roughly the same as the dimensions of the equipment, so that lumped-element circuit theory is inaccurate. As a consequence, practical microwave technique tends to move away from the discrete resistors, capacitors, and inductors used with lower frequency radio waves. Instead, distributed circuit elements and transmission-line theory are more useful methods for design and analysis. Open-wire and coaxial transmission lines give way to waveguides and stripline, and lumped-element tuned circuits are replaced by cavity resonators or resonant lines. Effects of reflection, polarization, scattering, diffraction and atmospheric absorption usually associated with visible light are of practical significance in the study of microwave propagation. The same equations of electromagnetic theory apply at all frequencies. While the name may suggest a micrometer wavelength, it is better understood as indicating wavelengths very much smaller than those used in radio broadcasting. The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields of study. Electromagnetic waves longer (lower frequency) than microwaves are called "radio waves". Electromagnetic radiation with shorter wavelengths may be called "millimeter waves", terahertz radiation or even T-rays. Definitions differ for millimeter wave band, which the IEEE defines as 110 GHz to 300 GHz. Above 300 GHz, the absorption of electromagnetic radiation by Earth's atmosphere is so great that it is effectively opaque, until the atmosphere becomes transparent again in the so-called infrared and optical window frequency ranges. • http://en.wikipedia.org/wiki/Microwave .
Views: 130030 Best0fScience
100 - Transverse and Longitudinal Waves In this video Paul Andersen compares and contrasts transverse and longitudinal waves. Waves carry energy through oscillations. In transverse waves the oscillations are perpendicular to the direction of the wave and in longitudinal they are parallel. Several examples and a simulation are included. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: 2007, Dantor 10:21, 1 November. Layer Structure of Earth Including Distance Scale, 2007. based on. http://commons.wikimedia.org/wiki/File:Aufbau_der_erde_schematisch2.png. Debianux. Deutsch: Schwingungs- Und Ausbreitungsrichtung Einer Longitudinalwelle (a) Und Einer Transversalwelle (b) (Beschriftung Auf Deutsch), September 14, 2008. Own work. http://commons.wikimedia.org/wiki/File:Longitudinalwelle_Transversalwelle.png. ESO. English: Artist’s Impression of How Type Ia Supernovae May Look like as Revealed by Spectro-Polarimetry Observations. The Outer Regions of the Blast Cloud Is Asymmetric, with Different Materials Found in “Clumps”, While the Inner Regions Are Smooth. Using Observations of 17 Supernovae Made over More than 10 Years with ESO’s Very Large Telescope and the McDonald Observatory’s Otto Struve Telescope, Astronomers Inferred the Shape and Structure of the Debris Cloud Thrown out from Type Ia Supernovae. Such Supernovae Are Thought to Be the Result of the Explosion of a Small and Dense Star — a White Dwarf — inside a Binary System. As Its Companion Continuously Spills Matter onto the White Dwarf, the White Dwarf Reaches a Critical Mass, Leading to a Fatal Instability and the Supernova. But What Sparks the Initial Explosion, and How the Blast Travels through the Star Have Long Been Thorny Issues. The Study Shows That the Outer Regions of the Blast Cloud Is Asymmetric, with Different Materials Found in “Clumps”, While the Inner Regions Are Smooth., November 30, 2006. http://www.eso.org/public/images/eso0644a/. http://commons.wikimedia.org/wiki/File:Artist%27s_impression_of_how_Type_Ia_supernovae_may_look_like_as_revealed_by_spectro-polarimetry_observations.jpg. “Kola Superdeep Borehole.” Wikipedia, the Free Encyclopedia, February 24, 2015. http://en.wikipedia.org/w/index.php?title=Kola_Superdeep_Borehole&oldid=648704046. “Longitudinal Wave.” Wikipedia, the Free Encyclopedia, April 4, 2015. http://en.wikipedia.org/w/index.php?title=Longitudinal_wave&oldid=654878903. McLassus, Roger. Deutsch: Das Bild Zeigt Eine Realistische Störung Der Wasseroberfläche (durch Kurzes Eintauchen Eines Stabes) Und Die Ausbreitung Dieser Störung Durch Kreiswellen von Eingeschränkter Konzentrizität Und Deren Überlagerungen. Der Flache Beleuchtungswinkel Gibt Dem Wasser Ein Fast Metallisches Aussehen.English: Surface Waves of Water: Expansion of a Disturbance. – It Shows a Realistic Disturbance (caused by Shortly Dipping a Stick into the Water) and Its Expansion Forming Interfering Circles of Limited Concentricity. The near Metallic Appearance of the Water’s Surface Is due to the Small Angle of illumination.Español: Ondas Superficiales En El Agua: Expansión de Una Perturbación. – Muestra Una Representación Realista de Una Perturbación (causada Por Sumergir Por Un Instante Un Palito En El Agua) Y Su Expansión Formando Círculos Concéntricos Que Interfieren. La Apariencia Metálica de La Superficie Del Agua Se Debe Al Bajo Ángulo En La iluminación.Français : Ondes de Surface Sur de L’eau : L’expansion D’une Perturbation. On Observe Une Perturbation Réaliste (due À Un Bâton) et Son Expansion Sous La Forme D’ondes Interférentes et Grossièrement Concentriques. L’aspect Quasi Métallique de L’eau Est Dû À Une Lumière rasante.Português: Ondas de Superfície de Água: A Expansão de Um Distúrbio. É Mostrada a Perturbação Realística (causada Por Um Bastão) E Sua Expansão Formando Círculos de Interferência Aproximadamente Concêntricos. A Aparência Metálica Da Superfície É Resultante Do Baixo Ângulo de Iluminação., January 14, 2006. picture taken by Roger McLassus (improved by DemonDeLuxe, Sep 2006). http://commons.wikimedia.org/wiki/File:2006-01-14_Surface_waves.jpg. “Polarizer.” Wikipedia, the Free Encyclopedia, March 23, 2015. http://en.wikipedia.org/w/index.php?title=Polarizer&oldid=653122103. “Polarizer.” Wikipedia, the Free Encyclopedia, March 23, 2015. http://en.wikipedia.org/w/index.php?title=Polarizer&oldid=653122103. “Transverse Wave.” Wikipedia, the Free Encyclopedia, March 25, 2015. http://en.wikipedia.org/w/index.php?title=Transverse_wave&oldid=653425060.
Views: 120339 Bozeman Science
We are so used to some things that we stopped wondering about them. Like light. What is light? Some kind of wavy thing, right? Kind of. Short bonus video for the people waiting for new stuff. Music by: https://soundcloud.com/epicmountain/light https://epicmountainmusic.bandcamp.com/track/light www.epic-mountain.com Our Patreon: https://www.patreon.com/Kurzgesagt?ty=h Visit us on reddit/facebook/twitter. You know. Social media stuff. https://www.reddit.com/r/kurzgesagt http://kurzgesagt.org https://www.facebook.com/Kurzgesagt https://twitter.com/Kurz_Gesagt THANKS A LOT TO OUR LOVELY PATRONS FOR SUPPORTING US: Phiroze Dalal, T0T0S, Ryan OHoro, Kay Brinkmann, A La Mode, Marcelo Fernandes de Souza Filho, Vince, Thomas Shiels, Tom Wardrop, Shawn Marincas, Pontus Attåsen, Paul, Horacio Medina, Jim Yang, Arnav Guleria, Clemens, Robert McKone, Tahseen Mushtaque, Todd Binkley, Jochen, Vahur S, Matthew von der Ahe, Thomas Russell, Erick, Vivek Kotecha, Nils Caspar, Holger Fassel, Artur Szczypta, Jeff Fellows, Daniel Duffee, Konstantin Shabashov, Jackson R Hanna, Tim drake, Pascal de Reuck, Mike Galles, ByeongWook Lee, Guus Ketelings, Franko Papić, Thalia, Narat Suchartsunthorn, Lorenz Zahn, Brian Aparicio, Jörg Vogelsang, Rashed Ali, Darwin Ranzone, Tyler Thornton, Bernat Unanue, David Pfister, Ash Patel, Han Saini, Ute Moll, Vrm Vee Are Em, Ioanna Bischinioti, Jenny Zhou, Vince Babbra, Dan Cortes, Matt K What is light? Help us caption & translate this video! http://www.youtube.com/timedtext_cs_panel?c=UCsXVk37bltHxD1rDPwtNM8Q&tab=2
Views: 5051776 Kurzgesagt – In a Nutshell
Get Your Crash Course Physics Mug here: https://store.dftba.com/products/crashcourse-physics-mug We learn a lot about our surroundings thanks to sound. But... what is it exactly? Sound, that is. What is sound? And how does it travel? And what is this Doppler Effect that we've heard so much about? In this episode of Crash Course Physics, Shini goes over some of the basics (and some of the not so basics) of the Physics of Sound. -- Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios -- Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashC... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support CrashCourse on Patreon: http://www.patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 650912 CrashCourse
124 - Electromagnetic Waves In this video Paul Andersen details the characteristics of electromagnetic waves. Electromagnetic waves are transverse waves that can move through both mediums and vacuums. The electric and magnetic fields oscillate perpendicular to the wave direction. Do you speak another language? Help me translate my videos: http://www.bozemanscience.com/translations/ Music Attribution Title: String Theory Artist: Herman Jolly http://sunsetvalley.bandcamp.com/track/string-theory All of the images are licensed under creative commons and public domain licensing: “Electromagnetic Radiation.” Wikipedia, the Free Encyclopedia, May 2, 2015. http://en.wikipedia.org/w/index.php?title=Electromagnetic_radiation&oldid=660494482. ESO. English: Artist’s Impression of How Type Ia Supernovae May Look like as Revealed by Spectro-Polarimetry Observations. The Outer Regions of the Blast Cloud Is Asymmetric, with Different Materials Found in “Clumps”, While the Inner Regions Are Smooth. Using Observations of 17 Supernovae Made over More than 10 Years with ESO’s Very Large Telescope and the McDonald Observatory’s Otto Struve Telescope, Astronomers Inferred the Shape and Structure of the Debris Cloud Thrown out from Type Ia Supernovae. Such Supernovae Are Thought to Be the Result of the Explosion of a Small and Dense Star — a White Dwarf — inside a Binary System. As Its Companion Continuously Spills Matter onto the White Dwarf, the White Dwarf Reaches a Critical Mass, Leading to a Fatal Instability and the Supernova. But What Sparks the Initial Explosion, and How the Blast Travels through the Star Have Long Been Thorny Issues. The Study Shows That the Outer Regions of the Blast Cloud Is Asymmetric, with Different Materials Found in “Clumps”, While the Inner Regions Are Smooth., November 30, 2006. http://www.eso.org/public/images/eso0644a/. http://commons.wikimedia.org/wiki/File:Artist%27s_impression_of_how_Type_Ia_supernovae_may_look_like_as_revealed_by_spectro-polarimetry_observations.jpg. Esquembre, Lookang many thanks to Fu-Kwun Hwang and author of Easy Java Simulation = Francisco. English: Electromagnetic Waves Can Be Imagined as a Self-Propagating Transverse Oscillating Wave of Electric and Magnetic Fields. This Diagram Shows a Plane Linearly Polarized Wave Propagating from Left to Right. The Electric Field Is in a Vertical Plane and the Magnetic Field in a Horizontal Plane., October 5, 2011. Own work. http://commons.wikimedia.org/wiki/File:Electromagneticwave3Dfromside.gif. McLassus, Roger. Deutsch: Das Bild Zeigt Eine Realistische Störung Der Wasseroberfläche (durch Kurzes Eintauchen Eines Stabes) Und Die Ausbreitung Dieser Störung Durch Kreiswellen von Eingeschränkter Konzentrizität Und Deren Überlagerungen. Der Flache Beleuchtungswinkel Gibt Dem Wasser Ein Fast Metallisches Aussehen.English: Surface Waves of Water: Expansion of a Disturbance. – It Shows a Realistic Disturbance (caused by Shortly Dipping a Stick into the Water) and Its Expansion Forming Interfering Circles of Limited Concentricity. The near Metallic Appearance of the Water’s Surface Is due to the Small Angle of illumination.Español: Ondas Superficiales En El Agua: Expansión de Una Perturbación. – Muestra Una Representación Realista de Una Perturbación (causada Por Sumergir Por Un Instante Un Palito En El Agua) Y Su Expansión Formando Círculos Concéntricos Que Interfieren. La Apariencia Metálica de La Superficie Del Agua Se Debe Al Bajo Ángulo En La iluminación.Français : Ondes de Surface Sur de L’eau : L’expansion D’une Perturbation. On Observe Une Perturbation Réaliste (due À Un Bâton) et Son Expansion Sous La Forme D’ondes Interférentes et Grossièrement Concentriques. L’aspect Quasi Métallique de L’eau Est Dû À Une Lumière rasante.Português: Ondas de Superfície de Água: A Expansão de Um Distúrbio. É Mostrada a Perturbação Realística (causada Por Um Bastão) E Sua Expansão Formando Círculos de Interferência Aproximadamente Concêntricos. A Aparência Metálica Da Superfície É Resultante Do Baixo Ângulo de Iluminação., January 14, 2006. picture taken by Roger McLassus (improved by DemonDeLuxe, Sep 2006). http://commons.wikimedia.org/wiki/File:2006-01-14_Surface_waves.jpg. “Photon.” Wikipedia, the Free Encyclopedia, May 1, 2015. http://en.wikipedia.org/w/index.php?title=Photon&oldid=660185835. “Sun.” Wikipedia, the Free Encyclopedia, May 5, 2015. http://en.wikipedia.org/w/index.php?title=Sun&oldid=660992057.
Views: 118146 Bozeman Science
For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, +91- 9100061777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. PROPAGATION OF ELECTROMAGNETIC WAVES:In communication using radio waves, an antenna at the transmitter radiates the Electromagnetic waves EM waves, which travel through the space and reach the receiving antenna at the other end. As the EM wave travels away from the transmitter, the strength of the wave keeps on decreasing. Several factors influence the propagation of EM waves and the path they follow. At this point, it is also important to understand the composition of the earth’s atmosphere as it plays a vital role in the propagation of EM waves. A brief discussion on some useful layers of the atmosphere is given in Table. Ground wave: To radiate signals with high efficiency, the antennas should have a size comparable to the wavelength of the signal at least /4. At longer wavelengths i.e., at lower frequencies, the antennas have large physical size and they are located on or very near to the ground. In standard AM broadcast, ground based vertical towers are generally used as transmitting antennas. For such antennas, ground has a strong influence on the propagation of the signal. The mode of propagation is called surface wave propagation and the wave glides over the surface of the earth. A wave induces current in the ground over which it passes and it is attenuated as a result of absorption of energy by the earth. The attenuation of surface waves increases very rapidly with increase in frequency. The maximum range of coverage depends on the transmitted power and frequency less than a few MHz. Sky waves:In the frequency range from a few MHz up to 30 to 40 MHz, long distance communication can be achieved by ionospheric reflection of radio waves back towards the earth. This mode of propagation is called sky wave propagation and is used by short wave broadcast services. The ionosphere is so called because of the presence of a large number of ions or charged particles. It extends from a height of ~65 Km to about 400 Km above the earth’s surface. Ionisation occurs due to the absorption of the ultraviolet and other high-energy radiation coming from the sun by air molecules. The ionosphere is further subdivided into several layers, the details of which are given in Table. The degree of ionisation varies with the height. The density of atmosphere decreases with height. At great heights the solar radiation is intense but there are few molecules to be ionised. Close to the earth, even though the molecular concentration is very high, the radiation intensity is low so that the ionisation is again low. However, at some intermediate heights, there occurs a peak of ionisation density. The ionospheric layer acts as a reflector for a certain range of frequencies 3 to 30 MHz.Electromagnetic waves of frequencies higher than 30 MHz penetrate the ionosphere and escape. These phenomena are shown in the Figure. The phenomenon of bending of EM waves so that they are diverted towards the earth is similar to total internal reflection in optics.
Views: 210948 7activestudio
We have understood how sound travels from one place to another. But can sound travel without air? Can sound be heard inside water? What are the Characteristics of Sound Waves? More about Sound Waves & it's Characteristics https://byjus.com/physics/characteristics-of-sound-waves/ We at Byju's Classes strongly believe that a spirit of learning and understanding can only be inculcated when the student is curious, and that curiosity can be brought about by creative and effective teaching. It is this approach that makes our lectures so successful and gives our students an edge over their counterparts. Our website- http://www.byjus.com/ Download our app on android- https://goo.gl/5Uz70E Download our app on an Apple device- https://goo.gl/2mLi1I
Views: 312124 BYJU'S
#iitutor #Physics #TheWorldCommunicates https://www.iitutor.com We can classify waves in two ways: by the direction of vibration of the medium and by the type of medium. Direction of vibration of medium Waves can be classified by the direction in which the medium moves in relation to the direction in which the wave carries energy through the medium. The two most common types of waves are: Longitudinal waves: In longitudinal or compression waves the medium moves back-and-forth parallel to the wave's velocity. This type of wave can be produced in a stretched spring. The regions where the spring is more tightly bunched are called compressions, while the regions that are less tightly bunched are called rarefactions. Sound waves are longitudinal waves that propagate through gases, liquids and solids. Transverse waves: When transverse waves travel through a medium, the medium moves back-and¬-forth perpendicular to the wave’s velocity. Other examples of transverse waves include waves on stretched strings, water waves and electromagnetic waves (e.g. light, radio, TV waves). Transverse waves can only travel through materials in which transverse or shear forces can be transmitted. For this reason transverse mechanical waves cannot travel through gases or within the body of a liquid. Transverse waves cause the medium to be displaced perpendicularly to the wave’s velocity (e.g. light and water waves). Longitudinal waves cause the medium to be displaced parallel to the wave’s velocity (e.g. sound). Electromagnetic and gravity waves The waves discussed so far have transferred energy by mechanical means. Adjacent particles interact by means of contact forces, pressing against their neighbours or pulling on them. A positively or negatively charged particle is affected by changing electrostatic or electromagnetic fields. Moreover, we can create a disturbance in a group of charged particles simply by waggling one of the particles up and down. This motion creates a varying electromagnetic field which moves outward from the charge that has been accelerated. Electromagnetic waves vibrate in two dimensions and travel in a third dimension. We can detect the progress of this electromagnetic wave by studying the motion of other charged particles in its path. X-rays, light, heat radiation and radio waves are all forms of electromagnetic waves. Electromagnetic waves can travel through a vacuum—they do not need to be transmitted through a medium. In a similar way, if we move a mass anywhere in the universe, that motion will have an effect on all of the other masses in the universe. The effect would normally be very small. However, in cases in which stars are orbiting each other or a star explodes, the changing distribution of material can be thought of as a source of gravity waves. It is expected that these waves would cause other masses in their path to vibrate. Attempts are being made to detect gravity waves using massive cylinders of metal and looking for minute changes in their length as the gravity wave passes through them. Medium of wave Seismic waves, sound waves and water waves are all mechanical waves. Mechanical waves require the energy associated with the wave to be passed from particle to particle within the material through which the wave appears to move. These waves must have a medium in which to propagate—they cannot travel through a vacuum Longitudinal or compression waves can travel in any material whether it is solid, liquid or gas. However, it is impossible for a transverse wave or a torsion wave to travel through liquid or gas. Have you ever tried to twist water? Electromagnetic waves rely on the interaction of electric and magnetic fields to carry energy, and unlike mechanical waves do not need a material medium for the transfer of energy. They can travel through a total vacuum. Gravity waves result from rapid changes in position of massive bodies. These waves are also transverse waves and like electromagnetic waves do not require a medium through which to propagate.
Views: 5615 iitutor.com
View the complete OCW resource: http://ocw.mit.edu/resources/res-8-005-vibrations-and-waves-problem-solving-fall-2012/ Instructor: Wit Busza In this session, we show how the properties (wavelength, frequency, amplitude and polarization) of an electromagnetic wave can be concluded from the equation that describes the wave and vice versa. *NOTE: These videos were originally produced as part of a physics course that is no longer available on OCW.* License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 31538 MIT OpenCourseWare
Propagation of Sound: How Does Sound Travel? We explore Sound Waves and learn about transmission of Sound. Sound needs a medium to travel. Sound can travel in solids, liquids and gases! Sound Waves consist of a pattern of compression and rarefaction. Try the Top 3 Questions at the end of video and write your answers and doubts in the comments below! Website: www.manochaacademy.com Facebook page: www.facebook.com/ManochaAcademy At Manocha Academy, learning Science and Math is Easy! The school coursework is explained with simple examples that you experience every day! Yes, Science & Math is all around you! Let's learn every day from everyday life!
Views: 14562 Manocha Academy
Hey Kids, have you ever thought what would we do without lights? Well, Dr. Binocs is here to light up your tickling brain cells. Watch the video so as to know interesting facts about light! The detailed video break-up is given below 00:24 – What is Light? 00:32 – How does light travel? 00:47 – Transparent Object 01:08 – Opaque Objects 01:31 – Translucent Object 02:17 – Refraction 02:49 – Trivia Time Voice Over Artist - Joseph D'Souza Script Writer - Sreejoni Nag Director - Aashka Shah Visual Artists - Aashka Shah, Pranav Korla Illustrators - Aashka Shah, Pranav Korla Animators - Tushar Ishi, Rupesh Hire, Digamber Bhadre VFX Artist - Swapnil Ghoradkar Background Score - Jay Rajesh Arya Sound Engineer - Mayur Bakshi Creative Head - Sreejoni Nag Producer: Rajjat A. Barjatya Copyrights and Publishing: Rajshri Entertainment Private Limited All rights reserved. Share on Facebook - http://goo.gl/7k7Kxi Tweet about this - http://goo.gl/WDfrOk SUBSCRIBE to Peekaboo Kidz:http://bit.ly/SubscribeTo-Peekabookidz Catch Dr.Binocs At - https://goo.gl/SXhLmc To Watch More Popular Nursery Rhymes Go To - https://goo.gl/CV0Xoo To Watch Alphabet Rhymes Go To - https://goo.gl/qmIRLv To Watch Compilations Go To - https://goo.gl/nW3kw9 Catch More Lyricals At - https://goo.gl/A7kEmO Like our Facebook page: https://www.facebook.com/peekabootv
Views: 629657 Peekaboo Kidz
The study of seismic waves provides a complete picture of the layered interior. Why does the earth shake? What are P and S waves? What are surface waves and body waves? What are propagation of earthquake waves? schools online, online classes for middle schoolers, online education programs for high school, teaching online high school, online courses for middle school Tool i use to make videos:- http://amzn.to/2jxqiHI Video of Dr. Keith Miller demonstrating P & S waves https://goo.gl/SQypKg Fill this feedback form for a better learning experience https://goo.gl/vrYPBw Click here if you want to subscribe https://www.youtube.com/user/TheRealSengupta
Views: 281031 Amit Sengupta
Using an oscilloscope, electronic keyboard, and piano, Bill Nye depicts the waves for sounds of varying pitches. This clip is from the episode, "Science of Music." This clip can be used to teach about sound waves, specifically wave lengths, in Physics. Bill plays different musical notes and illustrates on the oscilloscope that the waves of high pitch sounds are closer together than the waves of low pitch sounds. Bill also demonstrates that the loudness and the rhythm of the sound affects its wave length. Bill goes beyond physics and explains fundamental music concepts such as the difference between sounds and notes. Have you used this clip in one of your classes? Let us know in the comments below! For more educational clips from television and movies, visit us at https://www.classhook.com.
Views: 14781 ClassHook
#iitutor #Physics #WorldCommunicates https://www.iitutor.com The development of our civilisation would have been impossible without effective communication. The early development of speech and later the written word allowed us to evolve a cohesive community that was capable of passing ideas and beliefs from generation to generation. The messenger carrying the information has been supplanted by electromagnetic means of transmission that allow transfer of data at close to the speed of light. To all intents and purposes, the sending and receiving of data over satellite links is instantaneous, limited only by the speed of coding and decoding the information into suitable forms for transmission. Speech and many modern means of communication utilise waves. There are many different kinds of waves. The most obvious form of waves are those upon which we surf. Less obvious are sound waves, and possibly the least obvious are light or electromagnetic waves. In this section we discuss what waves really are, and their importance in the world around us. All waves share one thing in common, they provide a means of transferring energy from one point to another without the physical movement of particles from one point to another. Ocean waves are generated thousands of kilometres out to sea by the action of wind on the surface of the ocean. The energy transferred to the surface of the ocean eventually reaches land a few days later as a breaking wave. However, the water molecules that were originally moved by the wind far out at sea do not move far from their original positions. They pass on their energy to neighbouring molecules, which in turn affect their neighbours. In this way energy is transferred without mass motion. If you put energy into a string or rope by shaking one end up and down, the other end of the string will also begin to move up and down. Energy will have been transferred along the string, but the molecules of the string will not have moved from their original relative positions. In a similar way electromagnetic radiation (which includes light) can be thought of as the transfer of energy from one place to another by varying electrostatic and magnetic fields. If you could take hold of an electron in one corner of the room and shake it up and down, you would find that other electrons at the other side of the room would begin to vibrate a split second later. Energy is transferred from one side of the room to the other by an electromagnetic wave. If particles and molecules don't actually move from one place to another when energy is transferred by a wave, what actually happens to the individual particles? Let's consider what happens if we drop a rock into a pool. Ripples spread out from the position where the rock entered the pool and eventually reach the pool's edge. Floating twigs and straw near the centre of the pool are not washed ashore, instead they begin moving up and down about an equilibrium point. Their vertical motion is a form of simple harmonic motion. This vertical oscillation is transferred outward from one region of the pool to the next. As the oscillation builds up in one area it dies away in the preceding area. The wave is seen to travel out from the pool's centre. Waves travel through the medium carrying energy only: they do not take any part of the medium with them. They cause an oscillation of the particles in the medium as they pass, but every particle returns to its equilibrium position after each complete cycle of the wave. In this way the particles of the medium transmit the wave but do not move along with it, and we can think of the wave as energy moving through the medium. Waves are disturbances that transfer energy from one point in a medium to another point. They may propagate in one, two or three dimensions depending on the type of wave and the medium through which it is moving. The best way to understand how waves are formed and how they travel is to consider a single pulse or wave hump. We can make such a pulse on a horizontal string resting on a table by rapidly flicking one end of the string up then down. As your hand pulls the end of the string up, adjacent pieces of the string feel a force that also accelerates them in a vertical direction. They in turn affect neighbouring pieces of string. As each succeeding piece of string moves upward, the crest of the pulse moves along the string. By now your hand has returned to its starting position and the end of the string has also returned to its original position. As adjacent pieces of string reach the top of their motion they experience a force pulling them back toward their starting positions. The source of the pulse is the motion of your hand, and the pulse is transferred down the string because of cohesive forces (tension) between the particles of the string. PB2111 http://youtu.be/YklnpsauXaM
Views: 5729 iitutor.com
Created by David SantoPietro. Watch the next lesson: https://www.khanacademy.org/science/physics/light-waves/introduction-to-light-waves/v/polarization-of-light-linear-and-circular?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.khanacademy.org/science/physics/mechanical-waves-and-sound/doppler-effect/v/doppler-effect-reflection-off-a-moving-object?utm_source=YT&utm_medium=Desc&utm_campaign=physics Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Physics channel: https://www.youtube.com/channel/UC0oGarQW2lE5PxhGoQAKV7Q?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 556077 khanacademymedicine
View full lesson: http://ed.ted.com/lessons/is-light-a-particle-or-a-wave-colm-kelleher Can we accurately describe light as exclusively a wave or just a particle? Are the two mutually exclusive? In this third part of his series on light and color, Colm Kelleher discusses wave-particle duality and its relationship to how we see light and, therefore, color. Lesson by Colm Kelleher, animation by Nelson Diaz.
Views: 695157 TED-Ed
This video describes what frequency is, how it is measured, how frequency and wavelength are related visually and mathematically, and derives the mathematical relationship between frequency, wavelength, and the speed of light CC Academy videos are easy 101 crash course tutorials for step by step Chemistry help on your chemistry homework, problems, and experiments. Check out our best lessons: - Solution Stoichiometry Tutorial: How to use Molarity - Stoichiometry - Quantum Numbers - Rutherford's Gold Foil Experiment, Explained - Covalent Bonding Tutorial: Covalent vs. Ionic bonds - Metallic Bonding and Metallic Properties Explained: Electron Sea Model - Effective Nuclear Charge, Shielding, and Periodic Properties - Electron Configuration Tutorial + How to Derive Configurations from Periodic Table - Orbitals, the Basics: Atomic Orbital Tutorial — probability, shapes, energy - Metric Prefix Conversions Tutorial - Gas Law Practice Problems: Boyle's Law, Charles Law, Gay Lussac's, Combined Gas Law —More on Light | Wiki— "Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is visible to the human eye and is responsible for the sense of sight. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), or 4.00 × 10−7 to 7.00 × 10−7 m, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths). This wavelength means a frequency range of roughly 430–750 terahertz (THz). The main source of light on Earth is the Sun. Sunlight provides the energy that green plants use to create sugars mostly in the form of starches, which release energy into the living things that digest them. This process of photosynthesis provides virtually all the energy used by living things. Historically, another important source of light for humans has been fire, from ancient campfires to modern kerosene lamps. With the development of electric lights and power systems, electric lighting has effectively replaced firelight. Some species of animals generate their own light, a process called bioluminescence. For example, fireflies use light to locate mates, and vampire squids use it to hide themselves from prey. The primary properties of visible light are intensity, propagation direction, frequency or wavelength spectrum, and polarization, while its speed in a vacuum, 299,792,458 metres per second, is one of the fundamental constants of nature. Visible light, as with all types of electromagnetic radiation (EMR), is experimentally found to always move at this speed in a vacuum. In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not. In this sense, gamma rays, X-rays, microwaves and radio waves are also light. Like all types of light, visible light is emitted and absorbed in tiny "packets" called photons and exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics." Wikipedia contributors. "Light." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 5 Jun. 2016. Web. 18 Jun. 2016.
Views: 157339 Crash Chemistry Academy
Types of Sound waves physics Sound is a form of energy. Sound is that form of energy which makes us here. Sound travels in the form of waves A wave is a vibratory disturbance in a medium which carries energy from one point to another without there being a direct contact between two points. Example If we throw a piece of stone industrial surface of water in a pond, then expanding circles called ripples or water waves are formed over the surface of water when a water wave passes over the surface of water in a pond, full moment of water from the centre to the sides of the pond, only the water molecules vibrate up and down about their fixed position. A waveis produced by the vibration of the particles of the median through which it passes. example When sound waves produced by a ring Bell through air then there is no actual movement of the air from the bell only sound energy Travels through the vibration of molecules similarly water waves passes. There are two types of waves Longitudinal waves Transverse waves A wave in which the particles of the medium vibrate back and forth in the same direction in which the wave is moving, call a longitudinal wave. Diagram Longitudinal waves can be produced in all the three media: solids liquids and gases. Example The waves which travel along a spring( or slinky) when it is pushed and pulled that one end, are longitudinal waves. Diagram The Waves produced in air when a guitar wire( sitar wire, tanpura tanpura wire or violin wire) is plucked are longitudinal waves. Longitudinal wave consist of compressions and rarefactions travelling through medium. Transverse waves A wave in which the particles of the medium vibrate up and down 'at right angles' to the direction in which the wave is moving, is called a transverse wave.
Views: 156 24*7Motivate
How is sound created and how can we hear it? Learn all about how sound works with Jessi and Squeaks on SciShow Kids! ---------- Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/SciShow Or help support us by becoming our patron on Patreon: https://www.patreon.com/scishow ---------- Looking for SciShow elsewhere on the internet? Facebook: http://www.facebook.com/scishow Twitter: http://www.twitter.com/scishow Tumblr: http://scishow.tumblr.com Instagram: http://instagram.com/thescishow SOURCES:
Views: 633568 SciShow Kids
Energy moving Chemtrails. Energy moves in a double helix, perpendicular to the original flow because it is electrical /electromagnetic in nature. As is God.
Views: 217 Scientific Lee
Video illustration to TranslatorsCafe.com Sound Wavelength Calculator. In this video, Rina and I will show you the longitudinal and transverse waves using a slinky spring. Sound is transmitted through various media as different kinds of waves. It is transmitted through gases and liquids as longitudinal waves. When sound is propagated through solids, it can be transmitted as both longitudinal waves and transverse waves. To understand both kinds of waves, it is convenient to use a stretched Slinky spring, which will represent the medium (liquid or gas). When you compress and then release the Slinky spring’s coils at one end, the squeezed coils move forward thus transferring energy from one end of the spring to another. When a sound is propagating through liquid or gas, it travels away from the source as periodic compressions of the gas or liquid moving from the source. We can compare the spring coils to air or water molecules bumping against each other. Because the direction of these compressions is parallel to the direction of wave propagation, this wave is called longitudinal. If you move one end of the Slinky spring representing the medium perpendicular to it, a transverse wave is created. It is called transverse because the motion of the spring coils is perpendicular to the wave motion along the Slinky. The energy is transferred along the spring while its coils move in the direction, which is perpendicular to the direction of energy transfer. Using the Slinky, we can also observe vertical, horizontal and circular polarization of waves. Note that the spring represents the medium in which a wave is propagating and this medium does not travel with the sound wave. It only vibrates. We can easily observe this in a solid and the same is true for any liquid or gas. That is, the molecules of liquid or gas transport the vibration while the average position of the molecules does not change over time for any kind of waves. Music from YouTube Free Audio Library “Les Toreadors” from Carmen by Georges Bizet Ersatz Bossa by John Deley and the 41 Player
Views: 137 TranslatorsCafe.com
Hey kids! Doesn't it get annoying when someone calls you but you don't hear it ringing because of the silent mode? Doesn't SOUND play an important part in your life? The sound of a school bell, the sound of horn, the sound of music and so many more. So with a BOOM, come and see what Dr. Binocs has to tell you about Sound. The detailed video break up is given below. 00:37 – What is sound? 00:51 – How does sound travel? 01:29 – Does sound travel in Vacuum? 01:55 – What is Frequency? 02:53 – How is Volume measured? Voice Over Artist - Joseph D'Souza Script Writer & Director - Sreejoni Nag Visual Artist - Aashka Shah Illustrator - Aashka Shah Animators - Digambar Bhadre, Chandrashekhar Aher, Tushar Ishi VFX Artist - Kushal Bhujbal Background Score - Jay Rajesh Arya Intro Music - Mayur Bakshi Sound Engineer - Mayur Bakshi Creative Head - Sreejoni Nag Producer: Rajjat A. Barjatya Copyrights and Publishing: Rajshri Entertainment Private Limited All rights reserved. Share on Facebook - https://goo.gl/zTwjrc Tweet about this - https://goo.gl/28m4zW SUBSCRIBE to Peekaboo Kidz:http://bit.ly/SubscribeTo-Peekabookidz Catch Dr.Binocs At - https://goo.gl/SXhLmc To Watch More Popular Nursery Rhymes Go To - https://goo.gl/CV0Xoo To Watch Alphabet Rhymes Go To - https://goo.gl/qmIRLv To Watch Compilations Go To - https://goo.gl/nW3kw9 Catch More Lyricals At - https://goo.gl/A7kEmO Like our Facebook page: https://www.facebook.com/peekabootv
Views: 516144 Peekaboo Kidz
Find my revision workbooks here: https://www.freesciencelessons.co.uk/workbooks/shop/ In this video, we start looking at waves. We explore the key differences between transverse and longitudinal waves. We then look at how when a wave travels, the wave moves but not the medium. Deliberate Thought by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/?keywords=deliberate+thought Artist: http://incompetech.com/
Views: 179297 Freesciencelessons
Physics of waves: Covers Quantum Waves, sound waves, and light waves. Easy to understand explanation of refraction, reflection, and many other topics. Important correction: In the section of refraction, the colors are reversed. Violet light slows down in water more than red light, and violet light therefore bends more than red light when it transitions from air to water.
Views: 554192 Physics Videos by Eugene Khutoryansky