Question

power of lens short definition​

Answer 1

The ability of a lens to converge or diverge light rays depends on its focal length.  

Answer 2

$\huge\mathfrak{power \: of \: lens}$

power of lens is defined as reciprocal of its focal length. P=1/f. Its S.I unit is dioptre. one dioptre is defined as power of lens whose focal length is one meter.