A lens has a positive focal length f. The image is the same size as the object when

Question

Quizplus · Accepted Answer

When the image is on the opposite side of the lens from the object and is the same distance from the lens as the object, the image is located at 2f from the lens. In this situation, the lens follows the magnification formula M=-v/u=-f/f=-1, where u is the object distance, v is the image distance, and f is the focal length. The absolute value of M is 1, which means the image is the same size as the object. At other object and image distances, the magnification is either greater or smaller than 1, indicating a larger or smaller image than the object.

A Lens Has a Positive Focal Length F