Question

the speed of light in a particular transparent medium is 2/8 the speed of light in a vacuum. what is the index of refraction of the material?

Answer 1

Answer:

Refractive Index (RI) = (Speed of light in vacuum) / (Speed of light in medium)

Given, Speed of light in medium = (2/8) Speed of light in vacuum

Or = (Speed of light in vacuum) / 4

=> (Speed of light in vacuum) / (Speed of light in medium) = 4

Therefore, the refractive index of the medium = 4