Which law states that increasing the distance of the source of x-ray from the image receptor causes a decrease in the intensity of the x-ray beam?

The correct answer is the Inverse Square Law, which is fundamental in understanding the behavior of radiation. This law states that the intensity of radiation, including x-rays, is inversely proportional to the square of the distance from the radiation source. Therefore, when the distance between the x-ray source and the image receptor increases, the intensity of the x-ray beam reaching the receptor decreases significantly.

For instance, if you double the distance from the x-ray tube to the imaging plate, the intensity of the x-rays that reach the imaging plate decreases by a factor of four (2 squared). This principle is critical in radiography as it affects image quality and exposure levels, emphasizing the importance of positioning and distance in achieving optimal imaging results. Understanding this law enables technicians to calculate appropriate exposure settings based on the distance to ensure adequate image quality and minimize patient exposure to radiation.

The other concepts mentioned revolve around different physical principles related to x-ray production and image quality but do not specifically address the relationship between distance and intensity.