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- Dictionaryfluorescence/flʊəˈrɛsns/
noun
- 1. the visible or invisible radiation produced from certain substances as a result of incident radiation of a shorter wavelength such as X-rays or ultraviolet light.
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Fluorescence is simply defined as the absorption of electromagnetic radiation at one wavelength and its reemission at another, lower energy wavelength. Thus any type of fluorescence depends on the presence of external sources of light.
Mar 9, 2015 · The meaning of FLUORESCENCE is luminescence that is caused by the absorption of radiation at one wavelength followed by nearly immediate reradiation usually at a different wavelength and that ceases almost at once when the incident radiation stops; also : the radiation emitted.
Apr 5, 2023 · Fluorescence is a phenomenon where certain materials rapidly (around 10 -8 seconds) emit light when they are exposed to specific types of electromagnetic radiation, typically ultraviolet (UV) light. Fluorescent materials are those that can exhibit this characteristic.
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.
the quality of absorbing light of a short wavelength and producing light of a longer wavelength: The mechanisms of fluorescence have applications in television, fluorescent lighting, and radiography. Fewer examples. They check the samples under a microscope for bright-green fluorescence.
Jun 5, 2024 · Fluorescence, emission of electromagnetic radiation, usually visible light, caused by excitation of atoms in a material, which then reemit almost immediately (within about 10−8 seconds). The initial excitation is usually caused by absorption of energy from incident radiation or particles, such as.
Jan 30, 2023 · Fluorescence, a type of luminescence, occurs in gas, liquid or solid chemical systems. Fluorescence is brought about by absorption of photons in the singlet ground state promoted to a singlet excited …
Fluorescence is a light signal detected when a chemical compound called a fluorophore absorbs energy at a specific wavelength, causing it to become excited. The fluorophore then emits light at a longer wavelength as it relaxes and returns to its ground state.
the quality of a colour, material, etc. that appears very bright when light shines on it, so it can be seen in the dark. compare phosphorescence. See fluorescence in the Oxford Learner's Dictionary of Academic English. Check pronunciation: fluorescence. Definition of fluorescence noun in Oxford Advanced Learner's Dictionary.
a. 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. b.
