Question

what is the difference between convex mirror and concave mirror

Answer 1

Concave mirror are converging mirror.
A spherical mirror whose reflecting surface is curved inwards,that is,faces towards the center of the sphere is called concave mirror.
Whereas convex mirror are diverging mirror.
A spherical mirror whose reflecting surface is curved outward is called Convex mirror.

Answer 2

In other words, if the mirror coating lies in the inside of the spherical surface, then it is known as a convex mirror. Convex means “curved or rounded like the outside of a sphere or circle”. Lenses have two focal points, one on either side of the lens. Aconcave mirror converges light to a focal point.