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Question

What will be the angle of reflection if a ray of light strikes a plane mirror normally?


A

180

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B

90

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C

0

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D

None of these

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Solution

The correct option is C

0


When Incident ray AI moves towards normal OI the reflected ray also moves closer to the normal.

As a result, the angle between normal and reflected ray (angle of reflection) decreases and becomes zero when incident ray overlaps normal.

or

For normal incidence,
Angle of incidence = 0
We know,
The angle of reflection = Angle of incidence
Therefore, here the angle of reflection = 0


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