what is the angle between reflected ray and incident ray when the ray of light is incident normally on plane surface.
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The angle of incidence (angle an incident light ray makes with a normal to the surface) of the normal ray is 0 degrees. Since, the angle of incidence and angle of reflection are equal to each other, a normal ray will retrace its path upon reflection from a mirror (since angle of reflection will also be 0 degrees.
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The normal line divides the angle between the incident ray and the reflected ray into two equal angles. The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection.
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