Question

what is the difference between lens and Mirrors

Answer 1

Lenses have two focal points, one on either side of the lens. A concave mirror converges light to a focal point. For lenses, light converges to a point for a convex lens. A convex mirror diverges light, as does a concave lens.

Answer 2

Lens:

a piece of glass or other transparent material with curved sides for concentrating or dispersing light rays, usually used in telescope , and spectacle

Mirror:

is something that shows our reflection