A student obtained a sharp image of a lighted candle on a screen using a convexlens. Now he wants to focus a distant lamp on a far away electric pole. In whichdirection should the lens be moved for this purpose with respect to the screen, to get a sharp image on the screen? Justify your answer.
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The distance of the real image formed by the convex lens from the lens decreases as the object distance from the lens increases. hence the screen has to be moved towards the lens to obtain the sharp image of the electric pole.
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