Concept:A lens transmits and bends light, while a mirror returns light by bouncing it back.
Explanation:When a beam of light strikes a lens, it enters the transparent material and changes direction due to the lens's curved shape. This change in direction is called refraction.
A mirror is made with a polished, reflective surface. Light falling on it cannot go through; it is sent back into the original medium. This process is called reflection.
Thus, the main functional difference is that a lens refracts light, whereas a mirror reflects light.
Option B correctly states this difference.
Answer:B. refracts a beam of light while a mirror reflects it.