Home Physics Ray Optics Total Internal Reflection A diver in a swimming pool wants to signal h…
Physics Ray Optics Total Internal Reflection MCQ (Single Correct)

A diver in a swimming pool 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 for total internal reflection
D
He has to direct the beam at an angle to the vertical which is slightly more than the critical angle of incidence for the total internal reflection

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Text Solution

Verified by Experts
The correct answer is:
C

When incident angle is greater than critical angle, then total internal reflection takes place and will come back in same medium.

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