Q.

Which type of mirror is used in the head lights of vehicles?

A. Plane mirror
B. Concave mirror
C. Convex mirror
D. Parabolic mirror
Answer» B. Concave mirror
Explanation: Car head lights have concave mirrors because it collects and focuses as much as possible of the light from the bulb and send it out as a fairly tight beam in one direction only. The bulb of the head light is placed at the focal point. The reflected light is parallel and gives more visibility to the driver at night.
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