Question

What is the relation between focal length and power?

Answer 1

The power ϕϕ of a lens (or of an optical system) is the reciprocal of the effective focal length:

ϕ=1E.F.L.


hope it will help you

Answer 2

heyya HERE is the answer ✔✔✔✔✔✔✔


The optical Power of lens is equal to the focal length of the lens.

P =1/F

SI unit of power is =dioptre (D)

SI unit of focal length = Meter (m)

hence......✌✌✌➡➡➡➡

1D =1 m rise to -1.

hope it will help u?


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