Question

What is refractive index?​

Answer 1

Answer:

Explanation:

index of refraction of a material is a dimensionless number that describes how fast light travels through the material. It is defined as. where c is the speed of light in vacuum and v is the phase velocity of light in the medium.

Answer 2

$\huge\red{HELLO!!}$

Refractive index is the ratio of the velocity of light in a vacuum to it's velocity in a specified medium.

Hope it helps you..