Question

what is spherical lens give its types​

Answer 1

Answer:

Thus spherical lenses are of two major kinds called “Convex or Convergent” lenses and “Concave or Divergent” lenses. The point from which these rays converge or appear to diverge is called the “Focus” or “Focal point” and is denoted by the letter 'f'.

Answer 2

Answer:

A piece of a transparent medium bounded by at least one spherical surface, is called a spherical lens.

There are two types of spherical lenses:

(i) Convex or Converging Lenses : These are thick in the middle and thin at the edges.

(ii) Concave or Diverging Lenses: These are thin in the middle and thick at the edges.