Question

what is 1dioptre of power ​

Answer 1

Power of lens is the reciprocal of the

focal length.

Power of lens P = 1 / f ( in m ) or

P = 100 / f ( in cm ) .

The unit of power is called Diopter .

===> 1 diopter = 1 m to the power - 1 .

Answer 2

$\huge\mathbb\red{One Dioptre-}$

♥ Dioptre is usually reffered to as lens power. A dioptre is the measurement of power of lens or a curved mirror which is equal to the reciprocal of focal length in metres. 1 Dioptre is the SI unit of power of lens whose focal length is 1 metre. It is denoted by 'D'. OR When the focal length of the lens is 1 metre the power of lens is 1 Dioptre.♥

⭐Power of lens = 1/f (in m)

⭐Power of lens = 100/f (in cm)