What is the consequence of using an outdated fluorescent screen during radiographic testing?

Using an outdated fluorescent screen during radiographic testing can lead to mottling on the film. This occurs because older screens may have degraded in their ability to evenly distribute light when exposed to radiation. As a result, they can produce inconsistent illumination on the film, leading to non-uniform densities and patterns that resemble mottling. This effect can significantly compromise the quality of the radiographic image, making it harder to interpret the results accurately.

In contrast to the other choices, which suggest improvements or advantages in the radiographic image quality, the issue with an outdated fluorescent screen directly relates to the deterioration of the screen's performance, emphasizing the importance of maintaining up-to-date and well-functioning equipment for optimal results in radiographic inspections.