(i) Concave mirror is used in headlights of the vehicles.
It is so because concave mirror is known as converging mirror.
Now, when the bulb will be placed at the focus of the mirror, then the light will spread till infinity.
(ii) Rear view mirrors are made up of convex mirror.
It is so because in convex mirror the image formed is diminished and erect, which provide a large view.
Final Answer:
Concave mirror is used in headlights as it will spread the light and in rear view mirrors it is made up of convex mirror as it will provide large view.
