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)sideways from the CCD sensors
C)away from the CCD sensors
D)towards 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 distance between the lens and the sensor, allowing the image to be focused properly.

The Focal Length of the Lens of a Simple Digital