Question

The speed of light in air is 3 × 108 m s-1. Calculate the speed of light in glass. The refractive index of glass is 1.5

Answer 1

Given,
Speed of light in air, c = 3 × 108 m/s
Refractive index of glass, 𝛍 = 1.5
Speed of light in glass, v = ?
We know that, 

`c/v=µ ` 

∴ `v= (3xx10^8m//s)/1.5` 

`V=2xx10^8m//s`