Multiple Choice
The relative aperture or f -stop ( f ) for a camera lens is inversely proportional to the diameter of the aperture ( d ) . An f -stop of 2 corresponds to an aperture diameter of 40 millimeters for the lens on an automatic camera. Find the equation that relates f -stop and diameter.
A)
B)
C)
D)
E)
Correct Answer:

Verified
Correct Answer:
Verified
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