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[" A convex lens is placed on an optical...

[" A convex lens is placed on an optical bench and is "],[" moved till it gives a real image of an object at a "],[" minimum distance of "80cm" from the latter.Find the "],[" focal length of the lens.If the object is placed at a "],[" distance of "15cm" from the lens,find the position of "],[" the image."]

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