chemical photochromism

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• Photochromism — is the reversible transformation of a chemical species between two forms by the absorption of electromagnetic radiation, where the two forms have different absorption spectra. [ [http://pubs.acs.org/journals/chreay/thematic/00/photo.html Chemical …   Wikipedia

• Photochromie — Unter Photochromie versteht man die lichtinduzierte reversible Umwandlung zweier Spezies ineinander unter Änderung des Absorptionsspektrums sowie damit einhergehend ihrer physikalischen Eigenschaften. Die Rückreaktion kann dabei thermisch (T Typ… …   Deutsch Wikipedia

• Chromism — In chemistry, chromism is a process that induces a change, often reversible, in the colors of compounds. In most cases, chromism is based on a change in the electron states of molecules, especially the π or d electron state, so this phenomenon is …   Wikipedia

• Crystallographic defects in diamond — Synthetic diamonds of various colors grown by the high pressure high temperature technique, the diamond size is 2 mm …   Wikipedia

• Stimmungsring — Zauberbecher von LG Stimmungsring Als Thermochromie bezeichnet man die Eigenschaft bestimmter Substanzen, bei Erwärmung die Farbe zu ändern. Dieser Vorgang ist reversibel, d. h. nach dem Abkühlen nehmen sie wieder ihre ursprüngliche Farbe an.… …   Deutsch Wikipedia

• Photoelectrochemical processes — Photons emitted in a coherent beam from a laser Composition {{{composition}}} Interactions Electromagnetic, Optical, C …   Wikipedia

• Thermochromie — Zauberbecher von LG Stimmungsring Als Thermochromi …   Deutsch Wikipedia

• Photochemical and Photobiological Sciences — Infobox Journal title = Photochemistry Photobiological Sciences discipline = Photochemistry, Photobiology abbreviation = Photochem. Photobiol. Sci., PPS website = http://www.rsc.org/Publishing/Journals/pp/Index.asp|link1 =… …   Wikipedia

• 3D optical data storage — is the term given to any form of optical data storage in which information can be recorded and/or read with three dimensional resolution (as opposed to the two dimensional resolution afforded, for example, by CD). [ Three Dimensional Optical Data …   Wikipedia

• Fotocromático — Saltar a navegación, búsqueda Unas gafas fotocromáticas, tras la exposición de luz solar en una cierta superficie de la lente. El efecto fotocromático es aquel que se hace más oscuro ciertos materiales transparentes cuando percibe la luz directa… …   Wikipedia Español

• photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium