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Question

A diver at a depth of 12 m in water (μ=43) sees the sky in a cone of semi-vertical angle equal to


Your Answer
A
sin1(43)
Your Answer
B
tan1(43)
Correct Answer
C
sin1(34)
Your Answer
D
90

Solution

The correct option is B sin1(34)
We can represent this diagrammatically as

Thus; we see that θ=sin1(1μ)=sin1(34).

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