Why concave mirror is used in a torch?
Answer (1)
25th Nov, 2021
Concave mirrors are used in the Flashlights and torches. The bulb of a headlight or a torch is placed at the concave mirror focal point. In the Headlights and Torches, light beam after being reflected through a concave mirror emerges as parallel light rays. These reflected rays can travel long distances and have a high intensity.
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