Phenomena of Wave - Reflection and Refraction
From Deep to Shallower Region
When plane waves move from deep to shallow water, their wavelength become shorter and the velocity decreases.
The frequency of the wave remain unchanged.
This can be illustrated by placing a piece of rectangular Perspex of suitable thickness in the tank to reduce the local water depth.
Natural Phenomenon Involves Refraction
The effect of refraction causes seaside near to a cape is stony while sea near to a bay is sandy.