What happens to radiation intensity as one moves away from the source?

As one moves away from a radiation source, the intensity of radiation decreases. This decrease in intensity occurs due to the inverse square law, which states that the intensity of radiation is inversely proportional to the square of the distance from the source. As the distance increases, the radiation spreads out over a larger area, resulting in a reduction of intensity. This is a fundamental principle in radiation physics and applies to various types of radiation, including gamma rays, X-rays, and beta particles.

The effect is significant because it emphasizes the importance of distance in radiation protection measures—by increasing the distance from a radiation source, one can reduce exposure and potential health risks associated with radiation. Understanding this principle is crucial for safely managing and working with radioactive materials in various settings.