Question

which type of mirror is used in torch with two characteristics

Answer 1

concave mirror is used just behind the bulb of the torch . A concave mirror is used so that a parallel beam of light can be obtained , as this travels a greater distance. The concave mirror is used just behind the bulb of the torch and the bulb is placed at the focus of the mirror.

Answer 2

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Concave mirrors are used in search lights and torches so that we have a more focused light beam which will not diverge out and hence help in searching.