Question

The focal length of the plano convex lens is 2R where R is the radius of
curvature of the surface. Then the refractive index of the material of the
lens is ....
(A) 3/2 (B) 5/2 (C) 3/5 (D) 2/5​

Answer 1

Answer:

Here refractive index of the material of the lens is (A) 3/2.