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Question

Two mirrors meet at right angles. A ray of light is incident on one end at an angle of 30o as shown in figure. Draw the reflected ray from the second mirror.
464360_d93c4d981c89458f95028c0520254b7f.png

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Solution

At Mirror OA,
Angle of incidence = angle of reflection = 30o
CAB=30o

CAB+CBA+ACB=180o
30o+90o+ABC=180o
ABC=60o

At mirror OB,
Angle of incidence = angle of reflection = 60o

Note that,
AC || OB
Angle between incident ray and AC = Angle between reflected ray and OB =30o
Hence, first incident ray are last reflected ray in this case are parallel.

487699_464360_ans_c99e9252c14f44a093263b37840796a5.png

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