Describe the position of the source of light with respect to concave mirror torch light projector lamp and food light
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Torch light _ focus
Same for flood light
Bcoz strong parallel rays will come out of them only if light source is placed at focus of parabolic (concave ) mirror
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Answer:
Torch - the source of the light is at focus at the focus of the mirror . Thus, a parallel beam of light is obtained.
Projector lamp - the source of light is positioned at the centre of curvature.
Explanation:
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