Question

what is convex amd concave​

Answer 1

Answer:

Concave describes shapes that curve inward, like an hourglass. Convex describes shapes that curve outward, like a football (or a rugby ball).

Answer 2

Answer:

Convex simply means a part of sphere curved outwards like this - (

Examples : Convex mirrors and Convex lenses

Concave simply means a part of sphere curved inwards like this - )

Examples : Concave mirrors and Concave lenses

They are generally shapes