What happens when a ray of light falls normally (or perpendicularly) on the surface of a plane mirror?

When a ray of light falls normally (or perpendicularly) on the surface of a plane mirror, this means the angle of incidence is 0^o. From the second law of reflection, we know that angle of incidence is equal to the angle of reflection, so the angle of reflection will also be zero. Thus, the light ray will be reflected back along the same path.

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Updated on: 10-Oct-2022

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