Question

write the correct formula of power of lens​

Answer 1

Answer:

The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters. ... The formula for surface power is Ds = (u-1)/r, where u is the index of refraction and r the radius of curvature in meters.

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Explanation:

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Answer 2

Answer:

D = 1/f

Explanation:

The power of a lens is defined as the reciprocal of its focal length in meters, or D = 1/f, where D is the power in diopters and f is the focal length in meters. Lens surface power can be found with the index of refraction and radius of curvature.