BU Dental Radiology Practice Exam

How many principal components does the film have, according to the material?

Two One Three Four

Correct Answer:

Three

Explanation:

The film is described as a three-layer, or three-principal-component, system. It has a base that provides sturdy support and thickness, an emulsion layer where the silver halide crystals are suspended to store the latent image, and a protective coating on top to guard the emulsion from scratches and handling damage. While there are additional sublayers and packaging details, those three are the main functional parts that define the film. So the number of principal components is three.

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