Editing Fluorescence (section)

==== Fluorescence ====
Fluorescence is the phenomenon of absorption of [[electromagnetic radiation|electromagnetic]] radiation, typically from ultraviolet or [[visible light]], by a molecule and the subsequent emission of a photon of a lower energy (smaller frequency, longer wavelength). This causes the light that is emitted to be a different color than the light that is absorbed. Stimulating light excites an [[electron]] to an excited state. When the molecule returns to the ground state, it releases a photon, which is the fluorescent emission. The excited state lifetime is short, so emission of light is typically only observable when the absorbing light is on. Fluorescence can be of any wavelength but is often more significant when emitted photons are in the visible spectrum. When it occurs in a living organism, it is sometimes called biofluorescence. Fluorescence should not be confused with bioluminescence and biophosphorescence.<ref name="Fluorescence in marine organisms">{{cite web|title=Fluorescence in marine organisms|url=http://gestaltswitchexpeditions.com/fluorescence-in-marine-orga/|website=Gestalt Switch Expeditions|url-status=dead|archive-url=https://web.archive.org/web/20150221070425/http://www.gestaltswitchexpeditions.com/fluorescence-in-marine-orga/|archive-date=21 February 2015}}</ref> Pumpkin toadlets that live in the Brazilian Atlantic forest are fluorescent.<ref>{{Cite news|url=https://www.business-standard.com/article/pti-stories/fluorescence-discovered-in-tiny-brazilian-frogs-119032900584_1.html|title=Fluorescence discovered in tiny Brazilian frogs|agency=Press Trust of India|date=2019-03-29|work=Business Standard India|access-date=2019-03-30|archive-date=30 March 2019|archive-url=https://web.archive.org/web/20190330124158/https://www.business-standard.com/article/pti-stories/fluorescence-discovered-in-tiny-brazilian-frogs-119032900584_1.html|url-status=live}}</ref>