If a compound of silver like silver bromide, silver chloride or silver iodide are exposed to light, they break down to form tiny particles of silver that look black. An English scientist called William Talbot used this reaction to make photograph. You can try out his experiment yourself by coating some paper with silver chloride, covering it with a leaf, and then exposing it to light. The silver chloride will turn black where the light falls on it, but the part covered by the leaf will remain white.
Today, a thin layer of silver bromide is deposited on a sheet of photographic paper, and produce a negative image from which positive picture are printed. So, we can say that silver plays a key role in photography.
Today, a thin layer of silver bromide is deposited on a sheet of photographic paper, and produce a negative image from which positive picture are printed. So, we can say that silver plays a key role in photography.
