For a converging lens,when is the object distance equal to the image distance?
A)when the magnification is equal to zero
B)when the focal length is equal to the image distance
C)when the focal length is equal to half the object distance
D)when the focal length is zero

Question

Quizplus · Accepted Answer

When the object distance is equal to twice the focal length, the image distance is also equal to twice the focal length. This means that the object is placed at the center of curvature of the lens, and the image is formed at the same distance on the opposite side. Therefore, the object distance is equal to the image distance. This condition is satisfied when the focal length is equal to half the object distance.

For a Converging Lens,when Is the Object Distance Equal to the Image