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The Original Double Slit Experiment
 
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Light is so common that we rarely think about what it really is. But just over two hundred years ago, a groundbreaking experiment answered the question that had occupied physicists for centuries. Is light made up of waves or particles? The experiment was conducted by Thomas Young and is known as Young's Double Slit Experiment. This famous experiment is actually a simplification of a series of experiments on light conducted by Young. In a completely darkened room, Young allowed a thin beam of sunlight to pass through an aperture on his window and onto two narrow, closely spaced openings (the double slit). This sunlight then cast a shadow onto the wall behind the apparatus. Young found that the light diffracted as it passed through the slits, and then interfered with itself, created a series of light and dark spots. Since the sunlight consists of all colours of the rainbow, these colours were also visible in the projected spots. Young concluded that light consist of waves and not particles since only waves were known to diffract and interfere in exactly the manner that light did in his experiment. The way I have always seen this experiment performed is with a laser and a manufactured double slit but since the experiment was conducted in 1801 I have always thought that it should be possible to recreate the experiment using sunlight and household materials. That is basically what I did here. I will show the interference pattern I observed with my homemade double slit on 2Veritasium but I chose to use a manufactured double slit here to ensure that the pattern was impressive for observers at the beach. Special thanks to Henry, Brady, and Rupert for their cameos, Glen for filming and Josh for helping create the apparatus. Thanks also to the Royal Society for allowing us to view the original manuscript of Young's lecture and the University of Sydney for lending the double slits. Music by Kevin Mcleod (incompetech.com) Danse Macabre, Scissors
Views: 3724570 Veritasium
Wave Motion Interference
 
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See the new, higher quality upload. https://youtu.be/4o9TMxXTjOc A 16mm film now incorporated into my article http://www.gcmstudio.com/acoustics/acoustics.html because it's not only relevant to water, but sound and light waves as well. It is from my own collection that clearly demonstrates how 2 sources of vibration interact. Anybody who uses more that 1 speaker to listen to audio should see this, especially engineers. It shows an ideal world, free of reflections (echoes or reverberation) but is educational never the less. Yet, this form of interference is largely ignored, even in texts about acoustics. It has been edited for time but no concepts covered have been removed.
Views: 153551 wado1942
Ripple Tank: Single and Double Slit Diffraction and Interference
 
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A ripple tank is placed above a mirror and a projection screen. A horizontal bar, whose frequency can be varied, taps the surface of the water and produces plane waves. The waves are incident on a barrier containing an adjustable opening. With a narrow single slit opening we see a plane wave emerge as a spherical wave on the other side of the barrier. This can be explained by the Huygens-Fresnel principle which states that each point in the slit forms its own spherical wavefront source. With a wider slit, more point sources arise, causing interference patterns due to the larger angles involved with a broader spatial distribution of these sources.
Views: 44500 TSG Physics
Ripple Tank Diffraction and Interference of Waves
 
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Description and explanation of Diffraction and Interference of waves in a ripple tank
Views: 17376 PhysicsLP
Two source interference simulation
 
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Simulation showing two sources interfering. Simulation available at the "Two Source Interference" link at http://www.cabrillo.edu/~jmccullough/Applets/Applets_by_Topic/Superposition_Interference.html
Views: 704 Alex Barr
Ripple tank simulation
 
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Great simulation for exploring wave dynamics. Simulation is available at http://www.falstad.com/ripple/
Views: 9275 Alex Barr
Physics Lab Demo 14: Ripple Tank
 
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A physics lab demo of the ripple tank.
Views: 185212 CarletonPhysics
Ripples - two point source interference
 
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A 3-d animation of two point sources of circular waves and a view from multiple perspectives of the interference pattern produced
Views: 28324 ausautarch
FloWave Exhibition Video 2014
 
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This video was first shown at All-Energy 2014 and shows proving and client tests from shortly after the completion of the FloWave Ocean Energy Research Facility in April 2014.
Two Source Interference
 
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http://falstad.com/ripple/
Views: 1038 Nick Moore
Two Point Interference 1.mp4
 
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Interference of water waves from two point sources in a ripple tank. Nodal and anti-nodal lines identified.
Views: 5382 TJPhysicsOne
Ripple Tank Reflection Refraction
 
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Reflection and Refraction in a Ripple Tank are illustrated and explained
Views: 68892 PhysicsLP
GCSE Science Physics (9-1) Required Practical 8: Ripple Tank
 
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Find my revision workbooks here: https://www.freesciencelessons.co.uk/workbooks/shop/ In this video, we look at how to use a ripple tank to determine the wavelength, frequency and speed of water waves. This is a required practical so it is essential that you learn the details. 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: 159265 Freesciencelessons
Carefully Controlled Wave Interference Patterns
 
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This video illustrates how carefully producing many ripples on the surface of a medium can create desired waves from constructive and destructive interference. The red ring is an area of minimal wave motion and the green ring is an area of linear wave motion. As the number of red spherical balls (wave sources) increases the ringed areas approach their desired motion. The rigid black bars attached to the wave sources are shown to illustrate the mechanical motion of the sources. Contact me for more information and simulations.
Views: 855 Jacob
Interference of Waves | Superposition and Interference in light and water waves | Physics
 
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Interference of Waves | Interference and superposition explained in light and water waves with animation | Interference of waves in two dimensions | Physics The phenomena of the light which undergoes refraction and reflection by be explained by the 2 theories of light. They are corpuscular and wave theory of light. But some of the other phenomena such as interference and diffraction can only be explained by wave theory of light. We know that 2 or more wave, motions travel in space at the same time. Sometimes these 2 wave motions combine to and some physical effects take place. Inference is once such physical effect. When 2 or more waves cross each other in the same medium, they both interfere and accident takes. This accident is known as interference of waves. Interference is the combine effect of the disturbance caused by the each individual wave at the same place and at same time. This effect can be understood from the principle of superposition of waves. Principle Of superposition of waves: To understand this concept of the superposition, let's understand some of the examples. When we drop a pin in a tank, we see some circular waves. When other another pin is dropped, we see some more waves. These waves travel in the same tank and some or the other time these superimpose on each other. The resultant wave would have amplitude which is the sum of the displacement due to the individual waves. " The principle of superposition of waves states that when two or more waves travel through the same medium simultaneously, the resultant displacement at any point is the vector sum if the displacement due to the individual waves." In our case the pin is dropped in a ripple tank with 2 pins. If Y1 is the displacement caused at a point due to the first source and Y2 is the displace cause by the 2nd source, then the over displacement R at the point of interference would given by R=Y1+Y2 When both the sources have the same amplitude which then Y1,Y 2 would be equal to Y. When Y1 is due the crest or trough and Y2 is also due a crest or trough the resultant would be the maximum and when Y1 is due to a crest and Y2 is due to a trough or vice versa, the displacement would be minimum. When maximum displacement takes place it's called constructive superposition and when minimum displacement takes place it's called the destructive superposition. In constructive displacement, a maximum displacement curve is produced. Thus, when constructive displacement occurs then the phase difference between the waves would be ZERO or a multiple of 2π. When minimum displacement occurs, wave super impose destructively, the phase difference of the waves would be π or an odd integral multiple of the π. Interference of waves: When superposition of waves occurs, they could be constructive or destructive. This physical effort observed as a result of the superposition of waves is called interference. "The physical effect of the superposition of waves from the sources vibrating with the same frequency and amplitude is called the interference of waves. The physical effect is in the form of vibrations in the amplitude of resultant wave in a given potion of the medium" Interference is a special case of superposition of waves which originate from different sources but have the same amplitude, same frequency.
Views: 344842 Elearnin
Double Slit Interference
 
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A simulation of the double slit effect on waves. The interference pattern occurs on the right side of the screen.
Views: 42 TheAssemblery
A Level Physics - Two Source Interference of Waves
 
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Throw stones into a pond and the ripples pass through each other. The same effect of wave interference is also seen with sound, light, and microwaves. If you would like to see more A Level Physics videos then please Subscribe to my channel to keep updated with new videos and to search the Playlists already created. You can also visit my site 'A Level Physics Online' to see how all the videos relate to your course and for even more resources at http://www.alevelphysicsonline.com/ Thanks for watching, Mr Matheson
AWESOME Physics demonstrations. Interference of water waves experiment.
 
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A ripple tank is placed above a mirror and a projection screen. Two synchronous point sources, whose frequency can be varied, tap the surface of the water and produce circular waves. The interference pattern of the waves including the lines of nodes can be observed on the screen.
Views: 300 Physics experiments
ripple tank 2 source at 20hz 180 phase difference
 
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ripple tank 2 source at 20hz 180 phase difference. thanks to Yishun JC, jimmy goh and patrick for the setup
Two source wave interference in HD slow motion
 
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See the pattern when two circular wave sources meet.
Views: 574 Ben Ryder
two source wave interference
 
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This is an experimental upload of a high definition version of an older animation
Wave Interference
 
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This animation show the interference of two wave sources. The animation finishes by adding visual clues to the interfering wave fronts for both constructive and destructive interference.
Ripple tank simulation
 
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Ripple tank simulation using matlab.
Views: 174 derre98
Ripple Tank Interference Demonstration - Wyedean Science
 
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Investigating interference using a ripple tank. Visit our channel: https://www.youtube.com/user/wyedeanscience Subscribe: http://www.youtube.com/subscription_center?add_user=wyedeanscience
Views: 511 Wyedean Science
2D Interfering waves
 
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This short simulation shows the interference of two identical sinusoidal sources. Finite difference method was employed to obtain this result. Other than the edge containing the sources, all edges of the simulation box have approximate transparent boundaries.
Views: 1644 Simulations
Physics with MicroStation Interference in a Ripple Tank
 
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Learning Physics visually with MicroStation http://www.Bentley.com for deeper, intuitive understanding. Abstraction, formality and analytical rigor could follow later.
Views: 453 UjjwalRane
Double Slit Interference
 
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Simulation of two-slit interference in transverse waves using a numerical integration of the wave equation.
Views: 4025 Anthony Carapetis
STEM Product - Mini Ripple Tank
 
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This apparatus uses modern technology to completely update the Ripple Tank concept to provide a compact and elegant method of showing the wave phenomena of diffraction, refraction, reflection, and interference with none of the usual problems. The tank is 4" (100mm) square and is supported on a base which provides the wave generator and lighting. Images of the water-waves produced are projected upwards on to a frosted screen which is viewed from above. The white light source can be switched between constant illumination and strobe to give either moving or frozen images on the screen. In the strobe mode, the light source is synchronized to the wave generator so that perfectly static patterns are displayed. The wave frequency can be varied giving wavelengths in the tank ranging from several cm to a few mm. Comes with: a full set of 3 acrylic shapes for refraction 3 aluminum plates for reflection and 3 dippers for plane and circular wave generation. Power adapter included. Ripple Tank: goo.gl/1JJupw -- 2018 Product Catalog - goo.gl/Wk2ysK Visit us - http://american-scientific.com/ Facebook - http://www.facebook.com/AmericanScientific/ Twitter - http://twitter.com/AmSciTeam Instagram - http://www.instagram.com/amsciteam/ Music by: Nicolai Heidlas
Ripple Tank
 
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What you typically see in a ripple tank. (Difficult to see patterns)
Views: 68 T Wood
90 ft. Vertical Spike Wave in Slow Mo
 
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Gav and Dan go to an ocean simulator to film a wave that does not occur anywhere in nature in glorious 4K slow motion. Do we hit Dan in the face with it? Watch to find out. Spoiler: Yes.
Views: 8118575 The Slow Mo Guys
Constructive and destructive interference.
 
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Double slit experiment images.
Views: 28 Rodney Warren
Double Slit Experiment - Water Wave Interference Pattern
 
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We have added a soundtrack to this animation at: http://youtu.be/0cztIj1m7e4. However, it is part of a larger sequence, which is designed to accommodate agreements, disagreements and questions. So if you would like to see the animation in context or participate in a discussion, please visit http://allreality.com/quantum-physics.
Views: 54471 AllRealityVideo
Wave Tank - Wave Phase Cancellation Applied to a Fluid Medium
 
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For sound waves, noise cancellation can be achieved using a sound wave of the same amplitude and inverted phase. I have reproduced this wave interference in a fluid. This technique may have benefits in environmental, manufacturing sciences, and in medicine. The lab setup includes a wave tank which produces different types of waves. The wave tank consists of an acrylic tank, a continental shelf, rise, slope and fixture to dampen the waves. I incorporated a wave generator which consists of a foam wedge, a linear actuator, and a motor controller which controls the speed, direction and distance of the linear actuator. I used two triple-axis accelerometers and a triple-axis gyro to measure the wave force on land and in the water. An impact sensor was used to measure wave height and force as the wave hits the beach. A microcontroller coordinates all these devices. The experiment also incorporates an anti-phase wave generator which includes a second microcontroller, gyro, and a variable speed water pump. While testing, I varied the wave frequency and amplitude of the wave, capturing sensor data. During some tests, I utilized the anti-phase wave generator to interfere with waves generated by the wave generator. Data captured from the sensors was analyzed using MATLAB and Microsoft Excel. I was able to successfully generate repeatable waves. I was also able to interfere with the waves generated by the wave generator using the anti-phase wave generator, resulting in significantly reduced wave force at the beach.
Wave diffraction
 
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An explanation of wave diffraction. By Cowen Physics (www.cowenphysics.com) Simulation by PhET Interactive Simulations University of Colorado http://phet.colorado.edu.
Views: 5065 Cowen Physics
Ripple Tank Refraction
 
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Views: 2248 MustangPhysics
ripple tank 2 source at 20hz zero phase difference
 
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ripple tank 2 source at 20hz zero phase difference thanks to Yishun JC, jimmy goh and patrick for the setup
double slit coherent wave interference patterns
 
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Taster of the upcoming physics demonstration toolkit. See www.whylearnthat.co.uk
Views: 77633 grallator9
Interference of Waves
 
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Views: 33 TannerMcCord
water waves
 
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water waves at the bap
Views: 8231 amandalive
Making standing waves
 
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A standing wave is made by sending a wave group down the tank against a fixed wall. The reflected wave will superimpose upon the incident waves doubling the amplitude. As the wave maker imparts more energy in to the system, the amplitude increases. The waves are sustained by gravity and hydrostatic force and dissipated by fluid viscosity (the frictional forces against the wall are negligible). The video has been edited as the clopotis and seiche that occur last over a half hour and are eventually killed with the wave maker acting as an absorber, as it tries to produce waves offset by one half period of the waves hitting it.
Views: 749910 froudedude
SPH4U 9.3 Diffraction and interference of water waves
 
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Welcome to Koopmans OnPhysics! All videos and handouts can be found on the Koopmans OnPhysics website: http://www.erik-koopmans.com/physics/ These videos are designed to cover the Grade 11 and 12 Ontario Physics curriculum. Please enjoy!
Views: 1764 OnPhysics
2 Plane Wave Interference
 
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Two Plane waves, same wavelength, nearly same direction
Views: 1365 OpticsProf
Ripple Tank Project
 
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Made by Rachel Watley, Mark Jeska, Chad Kaiser, Stephanie Teffeteller and Annie Xie for Mr. Robinson's pre-AP physics class
Views: 91 Rachel Watley