Question

what are the factors on which the focal length of lens depends?​

Answer 1

Answer:

The focal length of a lens depends on the (i) radii of curvatureof its surfaces and (ii) on the index of refraction of the material the lens is made from.

Answer 2

$\huge\underline\purple{Answer}$

The focal length of a lens depends on the

(i) radii of curvatureof its surfaces and

(ii) on the index of refraction of the material the lens is made from