A silver halide is one of the compounds formed between silver and one of the halogens, usually silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). As a group, they are often referred to as the silver halides, and are often given the pseudo-chemical notation AgX. A chemical compound is a chemical substance formed from two or more elements, with a fixed ratio determining the composition. ... General Name, Symbol, Number silver, Ag, 47 Chemical series transition metals Group, Period, Block 11, 5, d Appearance lustrous white metal Atomic mass 107. ... The halogens are a chemical series. ... Silver bromide (Chemical formula: AgBr) is a photosensitive substance. ... Silver chloride (also called silver(I) chloride) is a chemical compound with chemical formula AgCl and is composed of one silver and one chlorine molecule. ... Silver iodide (chemical symbol: AgI) is a chemical compound used in photography and cloud seeding. ...

Silver halides are used in photographic film and photographic paper where an emulsion of silver halide crystals in gelatin is coated on to a film, glass or paper substrate. The gelatin is a vital part of the emulsion as it contains trace elements which increase the light sensitivity of the emulsion. Silver bromide and silver chloride may be used separately or combined, depending on the sensitivity and tonal qualities desired in the product. Silver iodide is always combined with silver bromide or silver chloride. Undeveloped Arista black and white film, ISO 125. ... Until the advent of digital photographic processes, the sole meaning of Photographic Paper was paper coated with light-sensitive chemicals. ... A. Two immisicble liquids, not emulsified; B. An emulsion of Phase B dispersed in Phase A; C. The unstable emulsion progressively separates; D. The (purple) surfactant positions itself on the interfaces between Phase A and Phase B, stabilizing the emulsion An emulsion is a mixture of two immiscible (unblendable) substances. ... Crystal (disambiguation) Insulin crystals A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... Gelatin (also gelatine) is a translucent brittle solid substance, colorless or slightly yellow, nearly tasteless and odorless, which is created by prolonged boiling of animal skin, connective tissue or bones. ... A. Two immisicble liquids, not emulsified; B. An emulsion of Phase B dispersed in Phase A; C. The unstable emulsion progressively separates; D. The (purple) surfactant positions itself on the interfaces between Phase A and Phase B, stabilizing the emulsion An emulsion is a mixture of two immiscible (unblendable) substances. ...

Silver halides are also used to make some corrective lenses darken when exposed to ultraviolet light (see photochromism). A corrective lens is a prosthetic lens worn on or before the eye, used to treat myopia, hypermetropia, presbyopia and astigmatism. ... Note: Ultraviolet is also the name of a 1998 UK television miniseries about vampires. ... Photochromism is defined as the reversible interconversion of a chemical species between two states with different absorption spectra. ...

When a silver halide crystal is exposed to light, a sensitivity speck on the surface of the crystal is turned into a small speck of metallic silver (these comprise the invisible or latent image). If the speck of silver contains approximately four or more atoms, corresponding to an absorption of four or more photons, it is rendered developable - meaning that it can undergo development which turns the entire crystal into metallic silver. This page is a candidate to be moved to Wiktionary. ... In photography a latent image is formed when light (or in radiography, X-rays) acts on a photographic emulsion. ... A piece of photographic film that has been exposed to light in a controlled manner must be developed before it can be used. ...