ASNT Radiographic Testing 2025 – 400 Free Practice Questions to Pass the Exam

In radiography, latitude refers to the range of exposure that a film can detect while still producing acceptable images without significant loss of quality. A higher latitude means that the film can tolerate greater variability in exposure levels and still produce images that are interpreted correctly.

When latitudes are higher, the acceptable density variations increase. This allows for greater freedom in the choice of exposure settings, as the film will still respond adequately even if there are fluctuations in the exposure that would occur due to factors like variations in the thickness of materials being radiographed or changes in source intensity. This flexibility can be particularly useful when working with materials of differing densities or in situations where precise control over exposure time is challenging.

Density variations pertaining to film are crucial, as they affect the ability of a radiograph to reveal defects and features within the tested material. Therefore, with higher latitude films or techniques, a wider range of conditions can still yield diagnostic images, allowing for better interpretation in practical applications.