Question

How many types of spherical refracting surfaces are there?

(a) 2

(b) 3

(c) 4

(d) 5

This question was addressed to me in a job interview.

This interesting question is from Ray Optics in division Ray Optics and Optical Instruments of Physics – Class 12

Answer 1

Right option is (a) 2

To explain I would say: The portion of a refracting medium, whose curved surface forms the part of a sphere, is known as a spherical refracting surface. Spherical refracting surfaces are of two types, namely, convex refracting spherical surface and concave refracting spherical surface.