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A small bulb is placed at the focal point of a converging lens. When the bulb is switched on, the lens produces : (a) a convergent beam of light (b) a divergent beam of light (c) a parallel beam of light (d) a patch of coloured light |
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Answer» A small bulb is placed at the focal point of a converging lens. When the bulb is switched on, the lens produces : (a) a convergent beam of light (b) a divergent beam of light (c) a parallel beam of light (d) a patch of coloured light |
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