If the intensity of radiation at 72 inches is 225 mR,what is the intensity if the SID is decreased to 40 inches?

Name: If the intensity of radiation at 72 inches is 225 mR,what is the intensity if the SID is decreased to 40 inches?
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Quizplus · Accepted Answer

Before actually calculating the answer,it is important to think through that decreasing the distance results in increased intensity.Using the inverse square formula,I₁/I₂ = (D₂)²/(D₁)²,225/X = 40²/ 72².

If the Intensity of Radiation at 72 Inches Is 225