Question

define power of lens and state its units.

Answer 1

Hey mate..!!

Here's your answer..

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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.
S.I. unit of power is D(Dioptre).
It is represented by letter 'P'.

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HOPE IT HELPS..

@Rêyaañ11

Answer 2

Hey friend!!!


Here's ur answer...


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Power of a lens is the reciprocal of its focal length.

Dioptre is the S I unit of power of lens.

One Dioptre is the power of a lens whose focal length is 1 metre.

$1d = 1 {m}^{ - 1}$
Convex lens has positive power while concave lens has negative power.


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