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