A ____ lens always gives a virtual, erect and magnified image when the object is placed at a distance less than the $F$ from the pole of the lens. ( $F$ is the focal length).

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Detailed Solution

A convex lens always gives a virtual, erect and magnified image when the object is placed at a distance less than the

F

from the pole of the lens. (

F

is the focal length).
A magnifying glass is a convex lens. We know that a convex lens is also called a converging lens and all the converging of the incident rays happens at F (Principal focus). When a convex lens is held closer to the object(

< F

), the object distance(u) becomes minimal, and the image formed is virtual, erect, and magnified. The object here lies between F and C. Therefore, the smaller the object's distance, the greater the magnifying power.
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