What is the Inverse Square Law in radiation safety?

The Inverse Square Law is a fundamental principle in radiation safety that describes how the intensity of radiation changes with distance from a source. Specifically, the law states that the intensity of radiation is inversely proportional to the square of the distance from the radiation source. This means that as you move farther away from the source, the intensity decreases quickly.

For example, if you double the distance from the radiation source, the intensity reduces to a quarter of its original value. This dramatic reduction occurs because the same amount of radiation is spread over a larger area as the distance increases, leading to a decrease in exposure. Therefore, the correct answer highlights that as you move away from the source, the intensity is greatly reduced, emphasizing the importance of maintaining distance to minimize radiation exposure for safety.