Final answer:
Radiographic sharpness is primarily affected by factors like the X-ray source size, motion, the film/screen system used, and geometric factors involving object and image distance, but is not directly related to quantum mottle, image noise, radiographic contrast, or object density.
Step-by-step explanation:
Radiographic sharpness is inversely related to the size of the X-ray source, patient motion, film/screen system, and distance factors, but not directly to any of the options provided in the question (quantum mottle, image noise, radiographic contrast, object density). However, object density does have an impact on the ability of X-rays to penetrate matter, and thereby affect the image quality and sharpness indirectly.
An irregular surface on the other hand produces a blurred image, which is contrary to sharpness. When discussing radiographic sharpness, understanding the relationship between object distance and image distance is also crucial, as sharpness is affected by these geometric factors. Moreover, interference and diffraction phenomena, like when weak light creates an interference pattern gradually on a screen, illustrates the concept that, in imaging, fine details also can represent sharpness or resolution, albeit in a different context.