A converging lens of focal length f produces a real image of a real object when the object is
A) closer than f from the lens.
B) at the distance f from the lens.
C) farther than f from the lens.
D) at any distance from the lens.

Question

Quizplus · Accepted Answer

A converging lens can produce a real image of a real object only if the object is placed farther than its focal length. If it is placed closer than the focal length, it will produce a virtual image; if it is placed at the focal length, the image will become infinitely far away, and if it is placed farther than the focal length, a real image will be produced on the opposite side of the lens. Therefore, the correct choice is C.

A Converging Lens of Focal Length F Produces a Real