today saroj came to know that concave mirror is used in torches ,search lights and headlights of vehicles can you help her to know the reason for this?
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hii mate your answer is
In torches, search lights and headlights of vehicles, the bulb is placed very near to the focus of the reflector (or concave mirror). It is due the reason that light rays after falling on reflecting surface become parallel to the principal axis of the mirror, and a concentrated beam of light is obtained
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