Question

why does refraction takes place

​

Answer 1

Answer:

Refraction is an effect that occurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. ... Since the light speed changes at the interface, the wavelength of the light must change, too.

Answer 2

Answer:

Refraction is an effect thatoccurs when a light wave, incident at an angle away from the normal, passes a boundary from one medium into another in which there is a change in velocity of the light. ... Since the light speed changes at the interface, the wavelength of the light must change, too.