The Focal Length of the Lens of a Simple Digital

question 7

Multiple Choice

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

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