A convex lens 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 convex lens of the small aperture is free from spherical aberration. The convex lens having a larger aperture forms a blurred image due to spherical aberration. Formation of the image from the spherical lens is only possible for small apertures.

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A concave mirror of small aperture forms a sharper image.

Why concave mirror of small aperture forms a sharper image?

f

d

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\frac{d}{2}

A convex lens always forms a virtual image.

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