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Question

Find the angle of deviation for the incident ray.


A
120
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B
60
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C
90
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D
135
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Solution

The correct option is C 90

Here i=(9045)=45
i.e., r=i=45
i+r=90
Hence, the ray will go horizontally after reflection.
Deviation (δ)=1802i=90
Hence, option (c) is the correct answer.

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