What law governs the relationship between distance and density in radiography?

The Inverse Square Law is the correct answer as it specifically relates to how the intensity of radiation decreases with distance from the source in radiography. This law states that the intensity of radiation or any similar effect is inversely proportional to the square of the distance from the source. In simpler terms, as the distance from the radiation source increases, the intensity or density of the radiation decreases rapidly.

This principle is fundamental in radiography because it helps professionals understand how to position both the patients and the equipment to achieve optimal imaging while minimizing radiation exposure. For instance, if the distance from the radiation source doubles, the intensity of the radiation reaching the imaging receptor is reduced to a quarter of what it was at the original distance. Thus, the Inverse Square Law provides essential guidance in ensuring safety and efficacy in radiographic practices.

The other choices pertain to different concepts and do not directly address the relationship of distance and density in the context of radiography.