Question

on what factors does the focal lenght lens depend

Answer 1

Answer:

The focal length of a lens depends on the

(i) radii of curvature of its surfaces

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

Answer 2

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.