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A ray of light makes an angle of 10° with the horizontal above it and strikes a plane mirror which is inclined at an angle O to the horizontal. The angle O for which the reflected ray becomes vertical
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A ray of light makes an angle of 10° with the horizontal above it and strikes a plane mirror which is inclined at an angle O to the horizontal. The angle O for which the reflected ray becomes vertical is (a) 40°. (B)50°. (C)80°. (D) 100°

User Electrionics
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1 Answer

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180 - (40 * 2) = 100°

So the answer is (D) 100°

Hope this helps! :)
User Laurentiu Stamate
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