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# SI unit of Power of a Lens is ‘Dioptre’ …

SI unit of Power of a Lens is ‘Dioptre’. It is denoted by the letter D. If f is expressed in meters, then, power is expressed in diopters. Thus, 1 diopter is the Power of a Lens whose focal length is 1 meter.

1 D = 1 m^{-1}

The power of a convex lens is positive and that a concave lens is negative.

Hinglish Excerpt
SI unit of Power of a Lens is ‘Dioptre’ ...

Tags: SI unit of Power of a Lens

Subjects: Physics

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