Question

what is refractive index? ​

Answer 1

Answer:

what is the refractive index please tell who's refractive index

Explanation:

this question is incomplete

Answer 2

Hey mate,

In optics, the refractive index 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.

Hope it helps...