A ray of light strikes a plane mirror PQ at an angle of incidence of 30 degree, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is:
(a)30 degree
(b)45 degree
(c)60 degree
(d)90 degree
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option c is correct......
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pratyushs776:
Thanks ..... But could u show me how u got 60 degree
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