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Waves
Transverse Waves |
Nice basic Applet. You can change Frequency, Wavelength or Amplitude |
3 Star | |
Rubber Duckie in water |
Notice that duckie only bobs up and down. |
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Longitudinal travelling wave |
As above |
3 Star | |
| Another simple animation from absorblearning.com | 3 Star | ||
Longitudinal and Transverse Wave |
Get
the pupils/students/learners to choose one spot and follow it |
4 Star | |
Standing waves in Open and Closed tubes |
you can also see the various harmonics |
4 Star | |
| Beautiful images of standing waves created by christmas lights | From flickr.com | 4 star | |
Diffraction and wavelength |
Notice that diffraction is most noticeable when slit width is same as wavelength |
4 Star | |
| Animation of radio waves diffracting around a hilltop. From absorblearning.com | 3 Star | ||
Notice colour also changes with wavelength |
4 Star | ||
| Lovely animation to show that sound diffracts around corners but light doesn't. | 5 Star | ||
Interference
|
Soundwaves: animation of constructive and destructive interference |
3 Star | |
Add two waves to see the Amplitude of the resultant. Then put one wave 180 degrees out of phase. |
4 Star | ||
Scroll down to the "Phase Difference" section and vary the phase difference between both waves. |
5 Star | ||
Scroll |
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Drag one set of concentric circles over the other and notice the lines of constructive and destructive interference |
4 Star | ||
Virtual Ripple Tank |
Click on "Setup: Two Sources" |
5 Star | |
Play with the different tabs. Excellent!! |
5 Star | ||
A short movie showing interference with a ripple tank: |
You don't want to know how finicky it is to set up the real thing, so this is not a bad back-up plan |
4 Star | |
The Doppler Effect: |
YouTube videoclip of a fire engine passing by an observer. Do a search on the site for lots of other examples. 20 seconds. |
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Here we have an ambulance passing with waves but without sound |
4 Star | ||
Here we can see the waves as they emanate from the source. You can pause at any stage. |
4 Star | ||
Similar to above |
4 Star | ||
Did you know this was first demonstrated by Doppler himself using a band on an open-top train? Seriously! |
5 Star | ||
Interactive simulation of the Doppler Ball. Click on the ball and then on the different people. |
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| Drag the slider to give the fire engine a velocity. | From absorblearning.com | 4 Star | |
The Doppler and Red Shift |
Now this is more like it! It's got a little bit of everything. Sweet as a nut. |
5 Star | |
Hubble and Red Shift |
Short video |
5 Star | |
And now for something completely different . . . |
Explaining the Doppler Effect with Trolls. From YouTube. 3:30 |
4 Star | |
Explaining the Doppler Effect with an Astronomer, a flying saucer and a cow (naturally). From YouTube. 2:30 |
5 Star |