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Power of a Lens

If a lens has...

Question

If a lens has a focal length, F = +12 cm, then it is a

A

Can be convex or concave

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B

Concave lens

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C

Diverging lens

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D

Convex lens

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Solution

The correct option is D
Convex lens

From the sign convention, the focal length of convex lens is positive

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