Question

name the type of lens if the power is -2.0D.find the focal length of the lens​

Answer 1

Answer:

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Explanation:

Power of the lens is then its focal length is

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.

Answer 2

Answer:

Explanation:

Power of the lens is then its focal length is

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