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Question

A ray of light is incident on a plane mirror at an angle of incidence of 30o. The deviation produced by the mirror is:

A
30o
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B
60o
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C
90o
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D
120o
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Solution

The correct option is D 120o
Since angle of incident =angle of reflection

Hence r=300

And here angle of deviation,

δ=1800(i+r)

δ=1200

903625_512250_ans_393cd3172eb54ef9b668fedad7e1b9fe.png

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