Question

lens formula and power of lens​

Answer 1

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Answer 2

$\huge{\mathcal{Lens\:Formula}}$

What is lens formula?

A lens formula may be defined as the formula which gives the relationship between the distance of image (v), distance of object (u), and the focal length (f) of the lens. It may be written as:

1/v - 1/u = 1/f

Where,

v = Distance of image from optical centre of lens

u = Distance of object from optical centre of lens

f = Focal length of lens

The lens formula is applicable both in convex lenses and concave lenses.

$\huge\mathcal{Power\:of\:Lens}$

It is defined as the reciprocal of focal length or it is the ability of a lens to bend the rays of light falling on it. Its SI unit is dioptre.

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