A thin converging lens is found to form an image of a distant building 24 cm from the lens. If an object is placed 16 cm from the lens, how far from the object will the image be?
A)64 cm
B)72 cm
C)32 cm
D)96 cm
E)48 cm

Question

Quizplus · Accepted Answer

The focal length (f) of the lens is 24 cm, as the image of a distant object forms at the focal point. Using the lens formula 1/f = 1/v - 1/u, where u = -16 cm (object distance) and f = 24 cm, we find v (image distance) to be 32 cm. The image is 32 cm from the lens, so it is 32 - 16 = 16 cm from the object.

A Thin Converging Lens Is Found to Form an Image