Question

Light travels with a velocity 1.5 x 108 m/ in a medium. On entering second medium its velocity becomes 0.75 x 108 m/. What is the refractive index of the second medium with respect to the first medium?

Answer 1

Given :

Velocity of light in a first medium = V1 = 1.5 x 108 m/*

Velocity of light in second medium = V2 = 0.75 x 108 m/*

Refractive index of second medium = 2n1 = ?

2n1 = 1 / 2

2n1 = 1.5 x 108 / 0.75 x 108

= 2

Hence, the refractive index of second medium with respect to first medium is 2.