A ray of light makes an angle of 30 degrees with the normal
A ray of light makes an angle of 30 degrees with the normal to a plane mirror. The mirror is turned through an angle of 10 degrees, making the incidence angle 40 degrees. Through what angle is the reflected ray turned?
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a ray of light makes an angle of 30 degrees with the normal to a plane mirror the mirror is turned through an angle of
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