What are the two main applications of parabolic mirrors ?

Explanation

As is known, the shape of parabolic mirror is such that all light rays falling on it in a direction parallel to the principal aixs are reflected through a single image point, irrespective of their distance from the principal axis. Two main applications of these mirrors are :
(i) In solar-thermal electric plant, focussed rays from the sun are used to generate steam, which drives a turbine connected to an electric generator.
(ii) In automobile head lights, a high intensity light bulb is held at the focus of parabolic mirror, and strong light emerges in a direction parallel to the principal axis of the mirror.