Question

8. What is the cause of refraction?​

Answer 1

Answer:

The main cause of refraction of light is the fact that it's speed isn't same in every medium.

Explanation:

Light travels fastest in Vacuum/Air (~ 3×10^8 m/s^-1) as there are rarer medium(have less density, so they provide less obstruction)

But as it enters a different media, it's speed changes due to change in density of the medium and as a result, refraction occurs.

"Refraction is bending of a ray/beam of light when it travels from one media to another"

Answer 2

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