Question

what is a convex lens??​

Answer 1

An optical lens is generally made up of two spherical surfaces. If those surfaces are bent outwards, the lens is called a biconvex lens or simply convex lens. These types of lenses can converge a beam of light coming from outside and focus it to a point on the other side.

Answer 2

Convex lens is a lens which is very useful and used in whole world. There is not a single person who has not seen convex. And if he had not seen he needs to wear spectacles which also contains Lens.