Question

What is the power lens and the unit

Answer 1

Explanation:

It is defined as the reciprocal of focal length

of a lens in meters.It is denoted by P.

P=1/f

where P=Power of lens

f=focal length

Its SI unit is dioptre(D).

We can say that the power of lens is the capacity of lens to converge or diverge the light rays.

The power of convex lens is +ive.

The power of concave lens is-ive.

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