noun Physics, Chemistry.
Origin of fluorescence
Examples from the Web for fluorescence
Fluorescence is most efficiently excited by the cathode rays of a vacuum tube.
Phosphorescence is exhibited chiefly by solids, fluorescence also by liquids and vapors.
The ultraviolet rays falling upon this screen were transformed into visible rays by the phenomenon of fluorescence.Artificial Light|M. Luckiesh
Muscarine is isomeric with betain and oxycholin, from which it is separated by its fluorescence and poisonous properties.Poisons: Their Effects and Detection|Alexander Wynter Blyth
Fluores′cent, having the property of fluorescence; Fluor′ic.
British Dictionary definitions for fluorescence
- the emission of light or other radiation from atoms or molecules that are bombarded by particles, such as electrons, or by radiation from a separate source. The bombarding radiation produces excited atoms, molecules, or ions and these emit photons as they fall back to the ground state
- such an emission of photons that ceases as soon as the bombarding radiation is discontinued
- such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10 –8 seconds
Word Origin for fluorescence
Word Origin and History for fluorescence
1852, "glowing in ultraviolet light," coined by English mathematician and physicist Sir George G. Stokes (1819-1903) from fluorspar (see fluorine), because in it he first noticed the phenomenon, + -escence, on analogy of phosphorescence.
Medicine definitions for fluorescence
Science definitions for fluorescence
Culture definitions for fluorescence
The emission of light from an object as a result of bombardment by other kinds of electromagnetic radiation, such as x-rays or ultraviolet rays. Fluorescent materials may appear one color when bathed in visible light and another color when exposed to other kinds of electromagnetic radiation.