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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