On a radiograph, spatter appears as __________ spots.

Spatter on a radiograph appears as light spots due to the presence of small metal droplets resulting from the welding process. These droplets can create areas of high density on the film, which results in lighter regions when developed because they obstruct the passage of radiation more effectively than the surrounding areas. The lighter spots indicate regions where the x-ray exposure was reduced due to the density of the spatter, making them easily recognizable on the radiograph.

Understanding how different defects appear on radiographs is crucial for interpreting weld quality and assessing potential defects in welded joints. In this context, identifying features such as spatter is essential for ensuring a thorough evaluation of the weld integrity.