Luminescence is light not generated by high temperatures alone. Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific context, electromagnetic radiation of any wavelength[1]. The elementary particle that defines light is the photon. ...

It is different from incandescence, in that it usually occurs at low temperatures. Examples include fluorescence, bioluminescence and phosphorescence. Molten glassy material glows orange with incandescence in a vitrification experiment. ... Fluorescence induced by exposure to ultraviolet light in vials containing various sized Cadmium selenide (CdSe) quantum dots. ... Image of hundreds of agar plates cultured with a species of bioluminescent marine bacteria displayed in a pattern as an art exhibit called Bioglyphs at Montana State University–Bozeman. ... Phosphorescent powder under visible light, ultraviolet light, and total darkness. ...

Luminescence can be caused by chemical or biochemical changes, electrical energy, subatomic motions, reactions in crystals, or stimulation of an atomic system.

The process of coating dials, hands, scales and signs on, particularly, aviation and navigational instruments and markings with luminescent materials is known as luminising.

The following kinds of luminescence are known to exist:

• Chemoluminescence (including Bioluminescence)
• Crystalloluminescence
• Electroluminescence
  • Cathodoluminescence
• Photoluminescence
  • Phosphorescence
  • Fluorescence
• Radioluminescence
• Sonoluminescence
• Thermoluminescence
• Triboluminescence

Historically, radioactivity was first thought of as a form of "radioluminescence", although it is today considered to be separate since it involves more than electromagnetic radiation. Lightsticks Chemoluminescence (sometimes chemiluminescence) is the emission of light (luminescence) as the result of a chemical reaction. ... Image of hundreds of agar plates cultured with a species of bioluminescent marine bacteria displayed in a pattern as an art exhibit called Bioglyphs at Montana State University–Bozeman. ... Crystalloluminescence is the effect of luminescence produced during crystallization. ... Animation of LCD, both unlit and with electroluminiscent backlight switched on Electroluminescence (EL) is an optical phenomenon and electrical phenomenon where a material emits light in response to an electric current passed through it, or to a strong electric field. ... Cathodoluminescence is an optical and electrical phenomenon whereby a beam of electrons is generated by an electron gun (e. ... Photoluminescence is a process in which a chemical compound absorbs a photon with a wavelength in the range of visible electromagnetic radiation, thus transitioning to a higher electronic energy state, and then radiates a photon back out, returning to a lower energy state. ... Phosphorescent powder under visible light, ultraviolet light, and total darkness. ... Fluorescence induced by exposure to ultraviolet light in vials containing various sized Cadmium selenide (CdSe) quantum dots. ... Radioluminescence is the phenomenon by which luminescence is produced in a material by the bombardment of ionizing radiation such as beta particles. ... Long exposure image of multi-bubble sonoluminescence created by a high intensity ultrasonic horn immersed in a beaker of liquid. ... Thermoluminescence dating is the determination of the date at which materials were formed by measuring the light energy released when heating it. ... Triboluminescence is an optical phenomenon in which light is generated via the breaking of asymmetrical bonds in a crystal when that material is scratched, crushed, or rubbed. ... Radioactivity may mean: Look up radioactivity in Wiktionary, the free dictionary. ...

External links

• Luminescence on Scienceworld