Question

how can waves in a ripple tank made to travel more slowly and when this happens what will be its effects on frequency and wavelength of the waves?
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Answer 1

Answer:

If a sheet of glass is placed in the tank, the depth of water in the tank will be shallower over the glass than elsewhere. The speed of a wave in water depends on the depth, so the ripples slow down as they pass over the glass. This causes the wavelength to decrease.

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