Question

what are convex lens ?​

Answer 1

The convex lens is a lens that converges rays of light that convey parallel to its principal axis (i.e. converges the incident rays towards the principal axis) which is relatively thick across the middle and thin at the lower and upper edges. The edges are curved outward rather than inward.

Answer 2

$\huge \bf \red{convex \: lens}$

lens such that a beam of light passing through it is brought to a point or focus. converging lens. lens, lens system,lense - a transparent optical device used to converge or diverge transmitted light and to form images.