21. The type of mirror used in automobiles to see the traffic on the rear side is A.Concave B.Plano-Convex C.Plane D.Convex
Option D Solution: Convex mirrors are used as side view mirrors in a car to see the traffic behind. This is because of the following reasons: The image formed in a convex mirror is highly diminished due to which a convex mirror gives a wide field of view of the traffic behind the vehicle.
