Task id16610
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A collecting lens moves between the luminous object and the screen, located at a distance L = 120 cm from each other. At a certain position of the lens on the screen, a clear magnified image of the object is obtained. When the lens moves l = 90 cm, a clear reduced image of the object is obtained on the screen. Find the focal length of the lens.
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Detailed solution. Format gif
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Task id16610
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