Question

what is power of lens?explain one dipotre​

Answer 1

Answer:

Explanation:

dioptre is SI unit of the power of a lens whose focal length is 1 metre. It is denoted by the letter D. Thus 1D = 1 m-1. Simply, when focal length ' f ' is expressed in metres, then, power is expressed in dioptres. The power of a convex lens is positive and that of a concave lens is negative.

Answer 2

Answer:

power of lens :

$\huge{\boxed{\mathcal{\blue{Dioptre}}}}$

✔1 dioptre of power of a lens is the reciprocal of its focal lens