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![[Post New]](/templates/default/images/icon_minipost_new.gif) 8 May 2007 20:17:32 IST
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A spherical lens of focal length f produces a virtual erect image n times the size of the object.Then what is the the distance of the object from lens if the lens is :------
i)Concave;
ii)Convex.
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Ken
From: UNITED STATES, Green Bay, Wisconsin
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