A silver halide is a compound of silver with a halogen, commonly represented as AgX for a monovalent halide. Silver bromide, silver chloride, and silver iodide are important examples.
Several silver halides are photosensitive. Light-generated charge can initiate formation of tiny silver-rich centres in a photographic grain, and chemical development amplifies the latent change into a visible image. This connects a microscopic photochemical event with macroscopic image formation.
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