Question

what is convex and concave lens??​

Answer 1

A convex lens or converging lens focuses the light rays to a specific point whereas a concave lens or diverging lens diverges the light rays. ... Concave lenses and convex lenses are often used together known as Concave – Convex lens.

Answer 2

The lens which have been formed by a part of a sphere.

The lens whose both surface have been curved outwards is called a convex lens and the lens whose surface have been curved inwards is called a concave lens