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A light beam is travelling from Region I...

A light beam is travelling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II , III and IV are `n_(0), (n_(0))/(2), (n_(0))/(6) and (n_(0))/(8),` respectively. The angle of incidence `theta` for which the beam just misses entering Region IV is

A

`sin^(-1)((3)/(4))`

B

`sin^(-1)((1)/(8))`

C

`sin^(-1)((1)/(4))`

D

`sin^(-1)((1)/(3))`

Text Solution

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The correct Answer is:
B
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