Question

What kind of mirror is used in the headlights of a car ? Why is it used for this purpose?

Answer 1

Concave mirror is used in the headlights of a car. This is because when a lighted bulb is placed at the focus of a concave mirror reflector, then the diverging light rays of the bulb are collected by the reflector to produce a strong, parallel-sided beam of light (which travels a considerable distance the darkness of night).