1.

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 q, the reflected light will deviate from its original path by the angle                                        [UPSEAT 2004]

A.            \[2\theta \]                          
B.            \[{{0}^{o}}\]
C.            \[\theta \]                             
D.            \[4\theta \]
Answer» B.            \[{{0}^{o}}\]


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