A radiation detector located 2.0 m from a radiation source indicates a radiation intensity of 100 mCi. Identify the radiation intensity if the detector is placed at a distance of 1.0 m from the source.

Question

Quizplus · Accepted Answer

The radiation intensity is inversely proportional to the square of the distance from the source. Therefore, when the distance is reduced to half (1.0 m from 2.0 m), the intensity would increase by a factor of 2^2 = 4. Therefore, the radiation intensity at 1.0 m would be 4 times higher than at 2.0 m, which is 400 mCi.

A Radiation Detector Located 2