When a wave or light ray moves from one medium to another its speed changes. The direction of the ray may also change. This property of waves is called refraction and commonly occurs with light rays.

Light changes speed as it passes from one medium to another. This is called refraction. The frequency of light does not change as it refracts. The refractive index of a material is a measure of ...

First, we need to know the difference between refraction and reflection. When light is refracted inside an ice crystal, the light bends and that’s when you get the rainbow. An example of ...