Question

define one dioptre of power of a lens. ​

Answer 1

Answer:

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 metres. (1 dioptre = 1 m−1.) It is thus a unit of reciprocal length.

Explanation:

Answer 2

dioptre is SI unit of the power of a lens whose focal length is 1 metre. It is denoted by the letter D . thus 1 d = 1 m inverse

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