Question

what is the the power of lens?????√√√√√√√¶¶¶¶¶¶¶÷÷÷÷×××

Answer 1

Power of lens is the ability of the lens to converge the rays of light falling on it.
When, f = 1 m, P = 1/f = 1/1 = 1 dioptre. 1 dioptre is the power of a lens whose focal length is 1 meter.

Answer 2

power of a lens is the reciprocal of it's focal length.

P= 1/ f