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Q.

A ____ mirror is used in the torches.


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Detailed Solution

A concave mirror is used in the torches.
Concave mirrors are converging mirrors. Concave mirrors are used in searchlights and torches so that we have a more focused light beam which will not diverge out and hence help in searching for things. It is used for different light rays falling on it to converge to a single point.
In the torch, the bulb is fixed at the focus of the concave mirror, so the light rays become parallel after reflecting from the mirror surface.Question Image 
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