Increasing the distance between the source and the image receptor will result in which effect on photon intensity?

Increasing the distance between the source of radiation (such as an x-ray tube) and the image receptor (such as a film or digital detector) has a direct effect on photon intensity due to the principles of the inverse square law. This law states that the intensity of radiation is inversely proportional to the square of the distance from the source.

As the distance increases, the same number of photons spreads over a larger area, resulting in a decrease in intensity. This diminished intensity is important in radiography because it can affect image quality. The reduced number of photons reaching the receptor can lead to underexposed images which may not provide the necessary contrast or detail for accurate diagnosis. Understanding this concept underlines the importance of proper distance management in radiographic techniques to optimize image quality.