Water as wave model
Video (00:07 minutes, without sound):
A stone is thrown into calm water, ripples are formed.
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It is, however, directly comparable only as far as the concentric shape of propagation is concerned. Looked at in detail, the vibrations are in fact very different.
Information and ideas:
Students can do the experiment themselves on an excursion out of school.
Relevant for teaching:
Communication and understanding
Vibrations and waves