Two vertical plane mirrors are inclined at an angle 60 with each other. A ray of light travelling horizontally is
reflected first from one mirror and then from the other. The resultant deviation is:
A) 60 B) 90 C) 120 D) 150
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Explanation:
Fromthefigure
a+b=90
0
⇒b=90
0
−a
Now,
b+60+c=180
t
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