Physics > 2015 > 7
JAMB UTME
If a document is to be produced using a duplicating camera, where should the document be placed in order to obtain an exact copy?
A.
At the point which is twice the focal length of the lens of the camera
B.
At the optical centre of the lens of the camera
C.
Between the principal focus and a point twice the focal length of the lens of the camera
D.
Beyond a point twice the focal length of the lens of the camera
Answer: D
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