Solved

With Regard to the Inverse Square Law, If the Focal $\frac {1} {4}$

Question 2

Multiple Choice

With regard to the Inverse Square Law, if the focal spot-to-film distance (FFD) doubles, the exposure time should:

A) decrease by $\frac {1} {4}$
B) decrease by $\frac {1} {2}$
C) double
D) quadruple

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