Concave mirror is used in the headlight of a car. It is used because when the bulb of headlight is placed at focus of concave mirror, it allows the light to spread out to infinity. The custom headlights provides you the extreme visibility in any condition
In which of the following is convex mirror used?
A convex mirror is used to gather light and reflect it back to a focal point. In order to get the light out of the telescope, another mirror is used to direct the light to an eyepiece.