In order to produce an image twice the size of an object with a converging lens of focal length f, what object distance should be used?
A) f
B) f/2
C) 2f
D) 2f/3
E) 3f/2

Question

Quizplus · Accepted Answer

To produce an image twice the size of the object, the object should be placed at a distance of 3f/2 from the lens. This is derived from the lens formula and magnification equation, where magnification (m) is -2 for a real, inverted image.

In Order to Produce an Image Twice the Size of an Object