Question
Why is a convex lens called a converging lens and a concave lens a diverging lens?
Solution
A convex lens, converges the light rays of a parallel beam to a particular point after refraction through the lens. Hence, a convex lens is called a converging lens.
A concave lens diverges the light rays of a parallel beam after refraction through it. Hence a concave lens is also called a diverging lens.

A concave lens diverges the light rays of a parallel beam after refraction through it. Hence a concave lens is also called a diverging lens.
