According to the Inverse Square Law, how does intensity relate to distance?

The Inverse Square Law states that the intensity of a physical quantity, such as light or radiation, decreases as the distance from the source increases. Specifically, this law indicates that the intensity is inversely proportional to the square of the distance from the source. As you move away from the source, the area over which the energy is spread increases with the square of the distance, leading to a decrease in intensity.

In practical terms, if you double the distance from the source, the intensity is reduced to one-fourth. This relationship highlights the critical importance of distance when considering the exposure to radiation or light, making it essential to understand in fields such as radiology and patient care. The correct understanding of this law is fundamental when working with any technology that emits energy, ensuring safety protocols are effectively implemented based on distance from the source.