If the intensity of radiation at 36 inches SID is 600 mR, what is the intensity if the distance is increased to 60 inches SID?

Question

Quizplus · Accepted Answer

The intensity of radiation follows the inverse square law, which states that the intensity is inversely proportional to the square of the distance. Using the formula $I_1/I_2 = (D_2^2)/(D_1^2)$, where $I_1$ and $I_2$ are the intensities at distances $D_1$ and $D_2$ respectively, we can calculate the new intensity. Plugging in the given values, $600 mR / I_2 = (60^2) / (36^2)$, solving for $I_2$ gives approximately 216 mR.

If the Intensity of Radiation at 36 Inches SID Is