A light beam is travelling from Region I to Region IV (refer figure). The refractive index in Region I, II, III and IV are 
respectively. The angle of incidence 
for which the beam just misses entering Region IV is
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a)
b)
c)
d)
respectively. The angle of incidence for which the beam just misses entering Region IV isa)
b)
c)
d)
Question ID - 152736 | SaraNextGen Top Answer A light beam is travelling from Region I to Region IV (refer figure). The refractive index in Region I, II, III and IV are respectively. The angle of incidence for which the beam just misses entering Region IV is
a)
b)
c)
d)
A light beam is travelling from Region I to Region IV (refer figure). The refractive index in Region I, II, III and IV are respectively. The angle of incidence for which the beam just misses entering Region IV is
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a) |
|
b) |
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c) |
|
d) |
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1 Answer
127 votes
Answer Key / Explanation : (b) -
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(b) Critical angle from region III to region IV
Now applying Snell’s law in region I and region III
Or
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127 votes
Answer Link
127