Posted on Mar 17, 2011 in Chemistry | 2 comments
what element is used in films, turns black in light, negatives?
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Silver (Ag) is the element used in negatives and black-and-white films and turns black in light. Initially, the silver is in the form of a metallic salt (e.g., AgNO3) and is converted to metallic silver (Ag) when the negative or black-and-white film is developed. The metallic silver (Ag) absorbs all visible frequencies of light and thus appears black because no frequencies of the visible light spectrum are reflected.
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