A ray of light strikes a plane mirror XY at an angle of incidence of 65 degrees, is reflected from the plane mirror and then strikes a second plane mirror YZ placed at right angles to the first mirror. What is the angle of reflection for the mirror YZ?
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Explanation:
The mirrors XY and YZ are at right angles, i.e., perpendicular. When a ray of light strikes the XY mirror with 65degree angle, the incident angle will be 90-65= 25 degree on the YZ mirror. Since angle of incidence= angle of reflection, the angle of reflection for YZ mirror will be 25degrees.
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