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Laws of Reflection

A light ray i...

Question

A light ray is incident perpendicular to the plane mirror. What is the angle of incidence and the angle of reflection respectively?

A

90°; 180°

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B

0°; 180°

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C

0°; 0°

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D

0°; 90°

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Solution

The correct option is C 0°; 0°
Angle of incident is the angle between incident ray and normal. In this case light ray incident normally so angle between incident ray and normal is zero.
Angle of incidence = Angle of reflection
Angle of reflection is also zero.

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