Today in class we observed water waves in a wave tray. We saw plane waves, circular waves, and wave diffraction. We also watched a slow-motion video of a drop of milk making waves in a saucer. The link for the video is given below and shows that as the wave propagates through the milk, the original drop stays in one place. This proves that particles in a medium stay in one localized area while the wave travels through the medium.
Milk Drop:
Slow motion video of a drop of milk
Find a large collection of slow motion videos here:
Interesting High-speed Video
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