You are attempting to use a converging lens as a magnifying glass (virtual and enlarged image). Where should the object be place with respect to the focal length to form this type of image? Explain
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$\cdot($ a) You want to use a lens with a focal length of 35.0 $\mathrm{cm}$ to produce a real image of an object, with the image twice as long as the object itself. What kind of lens do you need, and where should the object be placed? (b) Suppose you want a virtual image of the same object, with the same magnification - what kind of lens do you need, and where should the object be placed?
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