Write the reaction between silver bromide and hypo in the development of photographic film.

Write equations for the reaction of silver bromide with hypo in photographic process.

The image on an exposed and developed photographic film is due to

The image on an exposed and developed photographic film is due to

The image on an exposed and developed photographic film is due to

The image on an exposed and developed photographic film is due to

Give an example for each when coordiantion compounds play an important role in development of photographic film.

Write the balanced chemical equation for developing photographic films.

Write the balanced chemical equation for developing photographic films.

Photography is based on the nature of silver halides. Except AgF, the silver halides are photosensitive. These undergo decomposition in light and turn black due to formation of free silver. 2AgBroverset(light)to2Ag+Br_2 The photography films are prepared by adding 20% aqueous solution of AgNO_3 to NH_4Br solution containing gelatic. When such a film is exposed, emulsion gets affected and a latent image is formed on the film. When this exposed film or plate is dipped ina developer which contains a reducing agent, the part affected most during exposure are reduced to the maximum. The image becomes visible. It is called a negative. The remaining sensitive emulsion on the negative is removed by dissolving it in hypo solution (fixer). Fihnally, a positive of the nagative already prepared is made on silver bromide paper. Q. The compound formed on the unexposed photographic film or plate is