Question

what is a lens?what are convex and concave lenses​

Answer 1

Answer:

this is the answer

Explanation:

I hope this helps you

Answer 2

Explanation:

A curved piece of glass that makes things look bigger, clearer when you look through it.it is called lence.

concave lence-->A concave lens is a lens that possesses at least one surface that curves inwards.

convex---->In the convex lens, the curve is outward facing, whereas, in the concave lens, the curve faces inward.