Question

define the following terms(a) mirror (b)lens​

Answer 1

Answer:

I can't say number (a) so I will say only number (b)

Explanation:

(b) Lens is a transparent refracting medium bounded by two curved surfaces which are usually spherical.

Answer 2

A (Spherical) Lens is defined as a transparent refracting medium bounded by one or two spherical refracting surfaces, which are parts of hollow spheres, on other side. The working of a lens is based on the refraction of light rays, after passing through its aperture...

A Mirror is defined as an object that reflects light in such a way that, for incident light in some range of wavelengths, the reflected light preserves many or most of the detailed physical characteristics of the original light, called specular reflection...