Question

lens formula and power of a lens

Answer 1

Lens formula is

1/f = 1/v - 1/u

And to calculate power of lens

P = 1/f

Answer 2

Lens Formula:-

=1/u+1/v=1/f

Power of lens is the ability of thelens to converge the rays of light falling on it.

Definition: The powerof a lens is the reciprocal of its focal length in meters.

When, f = 1 m, P = 1/f = 1/1 = 1 dioptre.

1 dioptre is the power of a lenswhose focal length is 1 meter.


hope it helped.........☺️