A light beam is being reflected by using two mirrors, as in a periscope used in submarines. If one of the mirrors rotates by an angle θ, the reflected light will deviate from its original path by the angle
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a
2θ
b
0°
c
θ
d
4θ
answer is A.
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Detailed Solution
When a mirror is rotated by an angle θ, the reflected ray deviate from its original path by angle 2θ.
A light beam is being reflected by using two mirrors, as in a periscope used in submarines. If one of the mirrors rotates by an angle θ, the reflected light will deviate from its original path by the angle