calcium bromide
magnesium bromide
potassium bromide
silver bromide
sodium bromide
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Silver bromide (AgBr) is the metal bromide widely used in photography.
Reason:
Light Sensitivity: Silver bromide is highly sensitive to light. When exposed to light, it undergoes a photochemical reaction where it decomposes to form tiny particles of metallic silver, which appear black.
Image Formation: This property allows it to capture images on photographic films and papers. The exposed parts darken upon development, creating the photographic image.
Latent Image Formation: It forms a latent image (invisible) upon light exposure, which can be developed into a visible image by chemical processing.
Chemical Reaction (Simplified):
2AgBr (s)→2𝐴𝑔(𝑠)+𝐵𝑟2(𝑔)
Thus, silver bromide (AgBr) plays a key role in traditional (film-based) photography.
