An image is 4.0 mm in front of a converging lens with focal length 5.0 mm. Where is the object?
A)2.2 mm in front of the lens
B)2.2 mm behind the lens
C)9.0 mm in front of the lens
D)9.0 cm behind the lens
E)20 mm in front of the lens

Question

Quizplus · Accepted Answer

The object is 2.2 mm in front of the lens. This can be calculated using the thin lens equation: 1/f = 1/do + 1/di, where f is the focal length, do is the object distance, and di is the image distance.

An Image Is 4