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Question

Two mirrors A and B are placed at right angles to each other as shown in figure. A ray of light incident on mirror A at an angle of 25 falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be :

82306_65b516b075914c17b6756ad620ad1a36.png

A
25
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B
50
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C
65
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D
115
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Solution

The correct option is C 65
On plotting the ray diagram, we get by geometry the angle of reflection for the ray reflected from mirror B = 65o.
143258_82306_ans_50e610943ed64e81afff2bbc41222c1b.png

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