A rectangular glass slab ABCD of refractive index n1 is immersed in water of refractive index n2 (n1 > n2 ). A ray of light is incident at surface AB of the slab as shown in Fig. What is maximum value of angle of incidence on AB such that the ray emerges out only from the surface CD? - VgyanHub

Question:

A rectangular glass slab ABCD of refractive index n1 is immersed in water of refractive index n2 (n1 > n2 ). A ray of light is incident at surface AB of the slab as shown in Fig. What is maximum value of angle of incidence on AB such that the ray emerges out only from the surface CD?

Options :

(a) sin-1 [n1/n2 cos(sin-1 n2/n1)]]
(b) sin-1 [n1 cos(sin-1 1/n2)]
(c) sin-1 (n1/n2)
(d) sin-1 (n2/n1)

Answer :

(a) sin^-1 [n₁/n₂ cos(sin-1 n₂/n₁)]]

Answer Steps :

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