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When a converging lens is used in a camera (as in the top figure), the film must be at a distance of 0.210 m from the lens to record an image of an object that is 4.00 m from the lens. The same lens and film are used in a projector (see the bottom figure), with the screen 7.400 m from the lens. How far from the projector lens should the film be placed?

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