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A magnifying lens has a focal length of ...

A magnifying lens has a focal length of 10 cm. (a) Where should the object be placed if the image is to be 30 cm from the lens ? (b) What will be the magnification ?

Text Solution

Verified by Experts

`m=1/O = v/u=(-30)/(-7.5)=+4`
Thus, the image is erect and virtual and four times of the object.
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