Question

what is the formula of the power of the lense​

Answer 1

Answer :
$p \: = 1/f$

Explanation :
power is the reciprocal of the focal length.

SI unit of power is Diopter i.e. denoted as "D"

Power is negative for concave lens and positive for convex lens.

Answer 2

➡The power of lens is defined as the reciprocal of its focal length, in metres, or D =1/f, where D is power of diopters and f is the focal length is metre.⬅

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