While making a plane mirror, silvering in some portion of the mirror was thicker than the rest of the mirror. What effect can be expected in the image formation for the faulty portion?

Brigher image

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Duller image

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Distorted image

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No effect

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Solution

The correct option is D No effect
A plane mirror will form a sharp image as long as the silvering is thick enough to reflect most of the light. If some portion has even more silvering, it will still form the same image. This is because image formation depends on the intensity of incident light rays and smoothness of the surface.

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