State True or False:

A concave mirror of small aperture forms a sharper image.

True

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False

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Solution

The correct option is A True
This is because a concave mirror of small aperture is free from spherical aberration. A concave mirror having a larger aperture forms a blurred image due to spherical aberration. Formation of an image from spherical mirrors is only possible for small apertures.

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Why concave mirror of small aperture forms a sharper image?

A convex lens of small aperture forms a sharper image.

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