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A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface ?

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A ray of light strikes a plane mirror such that its angle of incidence is 30°. What angle does the reflected ray make with the mirror surface ?
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According to the second law of reflection, angle of incidence is equal to the angle of reflection. 

Given angle of incidence=30° 

Therefore, angle of reflection=30° 

Angle made by the reflected ray with mirror surface=90° -30° =60°

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