Question

The velocity of light in a medium is 1.5 x 188 m/s. What is the refractive index of the medium with respect to air, if the velocity in the air is 3 x 108 m/s?

Answer 1

Given data:

V₁ = 3 x 10⁸ m/s;

V₂ = 1.5 x 10⁸ m/s ;

¹η₂ = ?

Solution:

We know that,

¹η₂ = `("V"_1)/("V"_2)`

∴  ¹η₂ =  `(3 xx 10^8) / (1.5 xx 18^8)`

∴ ¹η₂ = 2

The refractive index of the medium with respect to air is 2.