★ Describe the positions of the source
of light with respect to a concave
mirror in 1.Torch li 2.Projector lamp 3. Floodlight
mirrors used in
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In torches, the source of light is placed at the focus of the concave mirror to obtain a parallel beam of light. In projector lamps, the source of light is placed at the centre of curvature of the concave mirror. In floodlights, the source of light is placed just beyond the centre of curvature of the concave mirror.
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