Question

write the difference between concave and convex mirror

Answer 1

Concave Mirror:
◆A concave mirror is a spherical mirror in which inner surface is polished.
◆ Concave mirror  are used as reflectors.
Convex Mirror:
◆ A convex mirror is a spherical mirror in which outer surface is polished.
◆ Convex mirror are used as rear view mirrors in motor vehicles.

Answer 2

concave mirror 
has a curved in shape or structure.it goes in like a cave.
it is polished on the outer side
they are thinner in middle
they passing in rays spread out.i.e they diverge.
image formed is real and also virtual.
convex mirror
it has a bulging out structure
it is polished in the inner side.
they are thicker in the middle
it will not let the rays diverge instead they converge.
the image formed is always virtual