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Q.

What is the total angle subtended by sky at the eyes of a fish in water? Take refractive index of water as 2

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a

180o

b

120o

c

150o

d

90o

answer is D.

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Detailed Solution

Sky is extended upto infinity. So the extremesinθc=1μ=12⇒θc=45oSo angle subtended by the sky
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What is the total angle subtended by sky at the eyes of a fish in water? Take refractive index of water as 2