Question

the power of lens is the diopter what will be its focal length​

Answer 1

Answer:

The diopter is the unit of measure for the refractive power of a lens. The power of a lens is defined as the reciprocal of its focal length in metres, or P = f 1, where P is the power in dioptres and f is the focal length in metres.

Explanation:

Answer 2

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Based on the above formula, the focal length of a lens, given its diopter, is calculated as follows:

For example, if a lens has diopter +2, its focal length is 1000/2=500mm, and a lens of +4 diopter has focal length 1000/4 = 250mm.

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