A ray of light travelling in air is incident at grazing incidence on a slab with variable refractive
Channel: Doubtnut
Date: 2020-01-26

A ray of light travelling in air is incident at grazing incidence on a slab with variable refractive index, n `(y) = [ky^(3//2) + 1 ]^(1//2)` where `k=1 m^(-3//2)` and follows path as shown in the figure. What is the total deviation produced by slab when the ray comes out.