| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,591,615,553 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
photochemical reaction |
Also found in: Dictionary/thesaurus, Acronyms, Wikipedia, Hutchinson | 0.01 sec. |
|
|
photochemical reactionChemical reaction initiated by absorption of energy in the form of visible (light), ultraviolet, or infrared radiation. Primary photochemical processes occur as an immediate result, and secondary processes may follow. The most important example is photosynthesis. Vision depends on photochemical reactions that occur in the eye (see retina; rhodopsin). In photographic film and paper, light activates their silver salts to a state that is easy to reduce to metallic silver grains during development. Bleaching of laundry, tanning of human skin, formation of Earth's ozone layer, and many industrial reactions are also photochemical. Certain air pollutants (see smog) become more reactive and form noxious compounds in photochemical reactions. photochemical reaction [¦fōd·ō′kem·ə·kəl rē′ak·shən] (physical chemistry) A chemical reaction influenced or initiated by light, particularly ultraviolet light, as in the chlorination of benzene to produce benzene hexachloride. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|