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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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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.
Fluorescence is one of two kinds of emission of light by a substance that has absorbed light or other electromagnetic radiation. When exposed to ultraviolet radiation, many substances will glow (fluoresce) with colored visible light. The color of the light emitted depends on the chemical composition of the substance.
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.
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 state. The spin of the electron is still paired with the ground state electron, unlike phosphorescence.
FLUORESCENCE definition: 1. light of a longer wavelength, particularly in a very bright colour, produced by something while…. Learn more.
Mar 20, 2017 · Fluorescence is the ability of certain chemicals to give off visible light after absorbing radiation which is not normally visible, such as ultraviolet light. This property has led to a variety of uses.
Oct 9, 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 X-rays or electrons.
Fluorescence definition: the emission of radiation, especially of visible light, by a substance during exposure to external radiation, as light or x-rays.. See examples of FLUORESCENCE used in a sentence.
The emission of electromagnetic radiation, especially of visible light, stimulated in a substance by the absorption of incident radiation and persisting only as long as the stimulating radiation is continued. 2. The property of emitting such radiation. 3. The radiation so emitted. [fluor (spar) + -escence.]
Fluorescence refers to the physical property of an object absorbing light at one wavelength and then reemitting it at another wavelength. If a molecule absorbs the light of one wavelength and emits it in another (i.e., fluoresces), we call that molecule a fluorophore.
