Water as wave model
Video (00:07 minutes, without sound):
A stone is thrown into calm water, ripples are formed.
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