What is thin lens?

Explanation

(i) A lens is formed by a transparent material bounded between two spherical surfaces or one plane and another spherical surface. In a thin lens, the distance between the surfaces is very small. If there are two spherical surfaces, then there will be two centres of curvature `C_1` and `C_2` and correspondingly two radii of curvature `R _1` and `R_2` (iii) A plane surface has its center of curvature C at infinity and its radius of curvature R is infinity (R = `oo`).