Why are concave mirrors used in torches?

Asked by akshitajain | 17th Mar, 2009, 06:29: PM

Expert Answer:

A concave mirror is used so that a parallel beam of light can be obtained , as this travels a greater distance.

The bulb is placed at the focus of the mirror.

Answered by  | 19th Mar, 2009, 04:51: PM

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