Question

what are the concave or convex mirror ?explain.

Answer 1

concave mirror
if inner side of spherical mirror is reflecting it is called concave mirror.
convex mirror
if outer side of spherical mirror is reflecting it is called convex mirror
I hope my answer is helpful for u

Answer 2

When Rays of light pass through lenses they either convert or diverge based on this phenomenon lenses can be classified as converging lenses or diverging lenses .converging lenses are called convex lens and diverging lenses are called concave lenses

A ray of incident light movie in parallel to the principal axis after reflection passed through focus in case of convex lenses

A ray of incident light movie parallel to the principal axis after reflection will appear to diverged from focus in case of concave lens