A light beam is travelling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II, III and IV are n0, n0/6, n0/8 respectively. The angle of incidence 0 for which the beam just misses entering Region IV is

Question:

A light beam is travelling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II, III and IV are n₀, n₀/6, n₀/8 respectively. The angle of incidence 0 for which the beam just misses entering Region IV is

Options :

(a) sin-1 (3/4)
(b) sin-1 (1/8)
(c) sin-1 (1/4)
(d) sin-1 (1/3)

Answer :

(b) sin-1 (1/8)

Answer Steps :

step 1

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