Question

What is Convex and Concave lens ?

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Answer 1

Explanation:

Lenses may be divided broadly into two main types: convex and concave. Lenses that are thicker at their centers than at their edges are convex, while those that are thicker around their edges are concave. A light beam passing through a convex lens is focused by the lens on a point on the other side of the lens.

Answer 2

lens that possesses at least one surface that curves inwards are called as Concave lens.

lens that converges rays of light that convey parallel to its principle axis are called as Convex lens.

very simple, Hope its helpful to you!