Q.

In a calm swimming pool, a person is viewing outside objects by keeping an eye at a depth h inside water. If the critical angle for water is θc , then the value of the diameter of the circle of view for outside objects will be:

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a

2hsinθc

b

2hcosθc

c

2htanθc

d

2hcotθc

answer is C.

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Detailed Solution

tanC=rh r=htanC D=2r=2htanC=2htanθc
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In a calm swimming pool, a person is viewing outside objects by keeping an eye at a depth h inside water. If the critical angle for water is θc , then the value of the diameter of the circle of view for outside objects will be: