A plane mirror is placed horizontally inside water 
. A ray falls normally on it, then mirror is rotated through an angle θ, the minimum value of θ for which ray does not come out of the water surface is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
The reflected ray will rotate by angle 2θ. For TIR to take place at water-air boundary,
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