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Q.

Is it true that in an arrangement of two plane mirrors perpendicular to each other, both the incident and the reflected ray will always be parallel to each other at any angle of incidence?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
When a light ray strikes the first mirror, it reflects off of it, and then strikes the second mirror. The reflected ray always emerges parallel to the incident ray.
Therefore, when two plane mirrors are kept at right angles, the incident and reflected rays will always be parallel to each other irrespective of the angle of incidence.
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