You wish to obtain a magnification of -2 from a convex lens of focal length f. The only possible solution is to
A) place a virtual object at a distance 3f/2 from the lens.
B) place a real object at a distance 3f/2 from the lens.
C) place a virtual object at a distance 2f/3 from the lens.
D) place a real object at a distance 2f/3 from the lens.
E) place a virtual object at a distance 5f/3 from the lens.

Question

Quizplus · Accepted Answer

For a convex lens, magnification (m) is given by -v/u, where v is the image distance and u is the object distance. To achieve a magnification of -2, the object must be placed at 3f/2, which is a real object position.

You Wish to Obtain a Magnification of -2 from a Convex