Why are decomposition reactions used in black and white photography?
As the above reactions are sensitive to light, they are used in black and white photography. It is seen that decomposition reactions require a source of energy in the form of heat, light, or electricity to decompose the compound involved. Hence, it can be concluded thatdecomposition reactions are endothermic in nature.
How do acid-base reactions occur in black and white photography?
In plain terms, in black and white photography, acid-base reactions occur. Light reacts with silver halide crystals to form an image. Electrons are kicked out when the photon energy from the light excites particles. This happens while in contact with the emulsion on the paper.
How does black and white photography work?
Black and white photography mainly depends upon the light sensitive material that helps in forming such contrasting images. That material is AgBr. When exposed to AgBr, the image then forms on the film. While the image is developing, sodium sulphate, an oxidised reducing agent converts the AgBr remains into visible metallic surface.