Question

what would be the value of angle of incidence and angle of reflection when a ray falls normally to a mirror surface?​

Answer 1

Explanation:

Second law of reflection: According to the second law, the angle of reflection is always equal to the angle of incidence. Also, it is important to note that when a ray of light falls normally on the surface of the mirror then the angle of incidence and the angle of reflection for such a ray of light will be zero.

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Answer 2

If the light falls normally on the mirror, the reflected light will retrace it's path. Also, since angle of reflection is equal to angle of incidence therefore, the angle of incidence as well as angle of reflection will be equal to zero.