How to find the position of object through magnification

1.	How to find the position of object through magnification
Answer» Magnification (v/u) = -1 , where v is lens-to-image distance and u is lens-to object distance.hence we get v = -uif we substitute v = - u in lens equation (1/v)-(1/u) = (1/f), we get -(1/u) - (1/u) = 1/f or u = -2fhence if object is placed at a distance 2f, we get magnification of image -1.

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