A ray of light travelling in air is incident at grazing incidence on a slab with variable refractive index n y k y32 1 1 2 where

Question

A ray of light travelling in air is incident at grazing incidence on a slab with variable refractive index n y k y32 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 A 60 B 53 C sin 4 9 1m air air D no deviation at all

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