Question

what is cause of refraction​

Answer 1

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. ... When light travels from air into water, it slows down, causing it to change direction slightly. This change of direction is called refraction.

Answer 2

Answer:

Refractive index

Explanation:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density) . This change of direction is caused by a change in speed. When light travel from air into water , it slows down , causing it to change direction slightly . This change of direction is called refraction.