A ray diagram showing refraction at the boundary between ... In this diagram, the nearest to the water side of the incoming wave slows down before the furthest side does. This causes the wave ...

The diagram shows that when water waves are reflected their direction changes, but their wavelength and frequency remain unchanged. Refraction is the change in direction of a wave as it travels ...

Light bends when travelling through a concentration gradient of sugar in water. The top layer of liquid is pure water ... In the tank, from top to bottom, the index of refraction is increasing, as in ...