Film speed is determined by the size of the crystals in the emulsion that coats the film.

Name: Film speed is determined by the size of the crystals in the emulsion that coats the film.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The size of the crystals in the emulsion determines how sensitive the film is to light, thus determining its speed. Larger crystals result in a slower film speed, while smaller crystals result in a faster film speed.

Film Speed Is Determined by the Size of the Crystals