Question

A thin lens with focal length ‘f’ (in air both side) to be used as magnifying glass. Which of the following statement regarding the situation is true?

• A. A converging lens may be used, and the object be placed at a distance greater than 2f from the lens.
• B. A diverging lens may be used, and the object be placed between f and 2f from the lens.
• C. A converging lens may be used, and the object be placed at a distance less than ‘f’ from the lens.
• D. A diverging lens may be used, and the object be placed at any point other than the focal point.

Answer 1

The correct option is C A converging lens may be used, and the object be placed at a distance less than ‘f’ from the lens.

For magnification we will use a converging lens and the object should be placed at a distance less than ‘f’ from the lens as the converging lens will produce an enlarged virtual image of the object if the object is placed at a distance less than 'f'.