A ray of light is incident on a plane mirror making an angle of 90° with the mirror surface. The angle of reflection for this ray of light will be:(a) 45° (b) 90° (c) 0° (d) 60°

When a ray of light is incident on a plane mirror making an angle of 90° (or perpendicularly) with the mirror surface, this means the angle of incidence is 0°. From the first law of reflection, we know that angle of incidence is equal to the angle of reflection (∠i = ∠r), so the angle of reflection will also be 0°. 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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