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A diver in a swimming poole wants to sig...

A diver in a swimming poole wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light

A

he must direct the beam vertically upwards.

B

he has to direct the beam horizontally

C

he has to direct the beam at an angle to the vertical which is slightly less than the critical angle of incidence

D

he has to direct the beam at an angle to the vertical which is slightly more than the critical angle of incidence.

Text Solution

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The correct Answer is:
C
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