The focal length of the lens of a simple digital camera is 40 mm, and it is originally focused on a person 25 m away. In what direction must the lens be moved to change the focus of the camera to
A person 4.0 m away?
A) It does not make any difference.
B) towards the CCD sensors
C) sideways from the CCD sensors
D) away from the CCD sensors

Question

Quizplus · Accepted Answer

To focus on a closer object, the lens must be moved away from the CCD sensors to increase the image distance.

The Focal Length of the Lens of a Simple Digital