A diver in a lake wants to signal distress to a person sitting on the – McqOptions

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1.	A diver in a lake wants to signal distress to a person sitting on the edge of the lake flashing his water proof torch. He should direct the beam
A.	Vertically upwards
B.	Horizontally
C.	At an angle to the vertical which is slightly less than critical angle
D.	At an angle to the vertical which is slightly more than critical angle
Answer» D. At an angle to the vertical which is slightly more than critical angle

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