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For a lens with focal length f find the smallest distance possible between the object and its real image.​
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For a lens with focal length f find the smallest distance possible between the object and its real image.​

User Swapnil G Thaware
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Answer:

Ray optics and optical instruments show that the least possible distance between an object and its real image for convex lens is 4f where f is the focal length of lens

User Janean
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