Question

What is refraction? What is the cause of refraction?

Answer 1

Answer:

the bending of light in different direction when it gets strike on any medium having different refractive index.

The root cause of refraction is Refractive index difference of different media

Answer 2

Explanation:

refraction means that the light rays are bend or change direction when they enter in new medium this happens because when the waves enters the new medium change the speed.