Fluorescence
From The Art and Popular Culture Encyclopedia
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Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation. It is a form of luminescence. In most cases, the emitted light has a longer wavelength, and therefore lower energy, than the absorbed radiation. The most striking examples of fluorescence occur when the absorbed radiation is in the ultraviolet region of the spectrum, and thus invisible to the human eye, and the emitted light is in the visible region.
Fluorescence has many practical applications, including mineralogy, gemology, chemical sensors (fluorescence spectroscopy), fluorescent labelling, dyes, biological detectors, cosmic-ray detection, and, most commonly, fluorescent lamps. Fluorescence also occurs frequently in nature in some minerals and in various biological states in many branches of the animal kingdom.
See also
- Absorption-re-emission atomic line filters use the phenomenon of fluorescence to filter light extremely effectively.
- Black light
- Blacklight paint
- Evos microscope
- Fluorescence correlation spectroscopy
- Fluorescence image-guided surgery
- Fluorescence in plants
- Fluorescence spectroscopy
- Fluorescent lamp
- Fluorescent multilayer card
- Fluorescent Multilayer Disc
- Fluorometer
- High-visibility clothing
- Integrated fluorometer
- Laser-induced fluorescence
- List of light sources
- Mössbauer effect, resonant fluorescence of gamma rays
- Organic light-emitting diodes can be fluorescent
- Phosphorescence
- Phosphor thermometry, the use of phosphorescence to measure temperature.
- Spectroscopy
- Two-photon absorption
- Vibronic spectroscopy
- X-ray fluorescence
