Question

name and define SI unit of power of a lens​

Answer 1

Diopter

A dioptre (British spelling) or diopter (American spelling) is a unit of measurement of the optical power of a lens or curved mirror, which is equal to the reciprocal of the focal length measured in meters. (1 diopter = 1 m−1.) It is thus a unit of reciprocal length.

Answer 2

Answer:

The SI unit of power of a lens is Dioptre .

Explanation:

A Dioptre is a unit of measurement of the optical power of a lens or curved mirror.