Question

explain the power of lens​

Answer 1

Answer:

Power of lens is the ability of the lens to converge the rays of light falling on it. It can also be defined as P=1/f where f is the focal length. ... One Dioptre is the power of a lens whose focal length is 1 metre. Convex lens has positive power while concave lens has negative power.

Answer 2

Answer:

Power of lens is the reciprocal of focal length of lens in meter. It's unit is dioptre (D)

Power of lens= 1/ focal length of lens

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