Question

what is refractive index​

Answer 1

Explanation:

the ratio of the velocity of light in a vacuum to its velocity in a specified medium.

Answer 2

Answer:

The refractive index is the measure of bending of a light ray when passing from one medium to another. It can also be defined as the ratio of the velocity of a light ray in an empty space to the velocity of light in a substance, n = c/v