a concave lens of focal length forms an image which is N times the size of object find the distance of object from the lens
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a convex lens of focal length f produces a virtual image m times the size of the object .the focus will have magnification equal to- . Answer: Let 'u' be the object distance, 'v' be the image distance and 'f' be the focal length of the lens.
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Answer:(1/n +1)f
Explanation: Image height by object height equals object distance by image distance for a lens
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