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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 2 > Chapter 17 - Refraction of Light by Plane Surfaces > A light beam is travelling from Region I to IV (Refer Figure). The refractive index in 4 Regions I, II, III and IV are n0, 2/n0 , 6/n0 ​and 8/n0 , respectively. The angle of incidence θ for which the beam just misses entering Region IV is

A light beam is travelling from Region I to IV (Refer Figure). The refractive index in 4 Regions I, II, III and IV are n0, 2/n0 , 6/n0 ​and 8/n0 , respectively. The angle of incidence θ for which the beam just misses entering Region IV is

2/n0 6/n0 ​and 8/n0 A light beam is travelling from Region I to IV (Refer Figure). The refractive index in 4 Regions I II III and IV are n0 respectively. The angle of incidence θ for which the beam just misses entering Region IV is