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→About Photochemical Reactions
===About Photochemical Reactions===
: Some [[chemical]]s [[Decomposition Reaction|decompose]] when exposed to [[light]].
: [[Photography]] originally used a [[chemical]] called [[Silver Nitrate]] which breaks down when exposed to [[light]] to make [[Silver]]. This creates a dark patch on the [[Photographic Paper|photographic paper]].
: A [[mixture]] of [[Hydrogen]] and [[Fluorine]] is sensitive to [[Ultraviolet]] [[light]] which will cause a [[Chemical Reaction|chemical reaction]].
: The [[retina]] in the [[eyes]] has a [[chemical]] which changes when exposed to [[light]]. This allows the [[Cell (Biology)|cells]] respond to [[light]].