1.

An object is placed at a distance ( f /3 ) from a convex lens . The distance of image from the lens is ?

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here is UR ANSWER

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for a convex lens,

FOCAL length=f

object distance=f/3

\frac{1}{f} = \frac{1}{v} - \frac{1}{u}

\frac{1}{f} = \frac{1}{v} - \frac{3}{f}

v=f/4

hope the answer helps

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