Question

What is refractive index? How is it related to critical angle?

Answer 1

hlo mate ✌️

In optics, the refractive index or 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.

Hope it helps.

Answer 2

Answer:

the refractive index or 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.

Sin C ( critical angle)= 1/u (u = refractive index)

Explanation: