Question

What is meant by power of the lens

Answer 1

The diopter is the unit of measure for the refractive power of a lens. The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters.

Answer 2

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

Dioptre is the S I unit of power of lens