Question

name the metal whose salt is used making photographic films?

Answer 1

silver and barium
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Answer 2

ans is


Photographic film is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. ...The emulsion will gradually darken if left exposed to light, but the process is too slow and incomplete to be of any practical use



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