GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The metal that is present in Photo Films is-
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Mercury
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Gold
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Silver
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Copper
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Explanation:
Detailed explanation-1: -The metal that is present in photo films is silver. The light-sensitive chemicals used in photographic film and paper are silver halides. Silver halide crystals in gelatin are coated on to a film base, glass or paper substrate.
Detailed explanation-2: -Silver bromide is used in photography as a component of an emulsion that helps develop a photographic image. Silver bromide is sensitive to light, and when suspended in gelatin, silver bromide’s grains create a photographic emulsion.
Detailed explanation-3: -Silver halides are used in photography because they are photosensitive as they react with light to form the image, silver halides being reduced to silver. They are also soluble in hyposolution.
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