_____ is used in making photographic films.
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Camera
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Silver halides are used in making photographic films.
Explanation:
Silver halides are used in making photographic films because they are light-sensitive. Silver halide crystals in gelatin are coated on the film. When a silver halide crystal is exposed to light, the sensitivity spots on the surface of the crystal turn into small spots of metallic silver. If the silver spot contains about 4 or more atoms, it is a developable surface. In other words, it is possible to perform development that converts the entire crystal into metallic silver.
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