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physical phenomena > event > atomic process > bound-bound transition > fluorescence

fluorescence
subject			fact

fluorescence	has definition The absorption of a photon of one wavelength and reemission of one or more photons at longer wavelengths, especially the transformation of ultraviolet radiation into visible light.
	has definition The emission of light at one wavelength, the green say, following absorption of light with a much shorter wavelength such as the ultraviolet. The UV photon parts with its energy by ejecting the electron into a high-energy level from which it cascades back down, releasing photons of lower energy and therefore longer wavelengths. A material which has this property is called a phosphor.
	is a kind of bound-bound transition
	is a kind of emission
emission	has inverse process absorption
atomic process	has domain atomic physics
radiation intensity modification	changes property intensity
event	has duration
	has synonym world point
	has time of occurrence

Kinds of fluorescence :

• Bowen fluorescence mechanism (2 facts) - A mechanism first discovered by Bowen which explains the anomalously strong lines of O III in the spectra of some planetary nebulae as fluorescence involving the radiative excitation of the 2p3d ³P^o₂ level of O²⁺ (54.71 eV) from the 2p^{2 3}P₂ state in the ground term by He II Lyman-α photons (54.17 eV).