Question

The focus is defined for a concave mirror but not for a convex mirror because :

• A. A concave mirror converges the rays to the focus, while a convex mirror diverges the rays.
• B. Rays after striking a convex mirror never meet again
• C. A convex mirror is not a focusing mirror
• D. Trick question! The focus is defined for a convex mirror as the point where the reflected rays appear to meet.

Answer 1

The correct option is D Trick question! The focus is defined for a convex mirror as the point where the reflected rays appear to meet.

The design of a convex mirror is in such a way that parallel rays of light after reflection from the convex mirror, diverge. These rays do not converge at a point as in the case of a concave mirror. But if we extrapolate the reflected rays, we can say they appear to meet at a point on the non-reflecting side of the mirror. We actually define this point as focus of a convex mirror.