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The refractive index of medium of a rectangular slab varies as $μ = \sqrt{1 + γ}$ . The ray enter from air to slab at origin in the condition of grazing incidence. The trajectory of ray inside slab is

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Correct option is B

Here, usinθ=KOr 1+ysinθ=K For air 1×sin900=K (grazing incidence)∴K=11+ysinθ=1 ∴sinθ=11+y ⇒tanθ=11+y−1=1y⇒dxdy=1y ⇒ 0xdx= 0y1ydy ⇒x=[y−12+1−12+1]0y⇒x=[2y]0y ⇒x=2y ⇒x2=4y

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The refractive index of medium of a rectangular slab varies as μ=1+γ . The ray enter from air to slab at origin in the condition of grazing incidence. The trajectory of ray inside slab is

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The refractive index of medium of a rectangular slab varies as $μ = \sqrt{1 + γ}$ . The ray enter from air to slab at origin in the condition of grazing incidence. The trajectory of ray inside slab is