The intensity of radiation is 100 units 15 feet from the source. The intensity would then be 300 units 5 feet from the source.

Question

Quizplus · Accepted Answer

According to the inverse square law, the intensity of radiation increases by the square of the distance it travels. If the distance is reduced to one-third (from 15 feet to 5 feet), the intensity would increase by the square of three (3^2 = 9), making the intensity 900 units, not 300.

The Intensity of Radiation Is 100 Units 15 Feet from the Source