A diver at a depth of 12 m in water ( = 4 3 ) sees the sky at a cone of semivertical angle

MHT CET Physics question

A diver at a depth of 12 m in water sees the sky at a cone of semivertical angle

Answer: (C)

The whole sky is seen through a cone whose semivertical angle is the critical angle, , so ; is impossible

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Question ID VK-069319