Question

Explaib how focal lenght of lens depends on surrounding medium

Answer 1

Answer:

The focal length of a lens is depended on the surrounding medium becaz the angle of refraction of a lens is depended on the indices of refraction of the medium of lens and the incoming medium and the difference in their indices.

Explanation:

The focal length of a lens depends on the

(i) radii of curvature of its surfaces and

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