When moving double the distance from the source of radiation, how much does the dose to the operator decrease?

The correct response indicates that when moving double the distance from a source of radiation, the dose received by the operator decreases to one fourth of the original amount. This phenomenon can be explained by the inverse square law, which states that the intensity of radiation is inversely proportional to the square of the distance from the source.

When the distance from the radiation source is doubled, the intensity of the radiation (and consequently the dose received) decreases by a factor of two squared. Since 2 squared equals 4, the dose is reduced to one fourth of what it would have been at the original distance. This principle is fundamental in radiologic safety, reinforcing the importance of maximizing distance to minimize exposure to ionizing radiation. Understanding this law helps professionals effectively implement safety measures and protect themselves from harmful radiation levels.