Question

A ray of light travels from one medium 1 to medium 2 and then from medium 2 to the medium 1,such that refractive indices of the media are 1mew2 and 2mew1 respectively. What is the relation between above refractive indices

Answer 1

¹μ₂ = μ₁/ μ₂          (1)

and, ²μ₁ =  μ₂/ μ₁               (2)

comparing (1) and (2)

1/¹μ₂ = ²μ₁