fluorescence
/fluorescence/
Definition
- Noun:
- The emission of light by a substance that has absorbed light or other electromagnetic radiation of a different wavelength: Fluorescence is a physical process where a material absorbs light (often invisible ultraviolet light) and then immediately re-emits light at a longer, usually visible, wavelength. The emitted light stops almost as soon as the exciting radiation is removed.
Examples of Usage
- Noun:
- The bright fluorescence of the mineral under UV light made it easy to identify.
- Scientists use the property of fluorescence in biological staining to visualize cell structures.
- The jellyfish's green fluorescence is caused by a protein called green fluorescent protein (GFP).
Advanced Usage
"Fluorescence microscopy": A technique that uses fluorescence to generate an image, allowing scientists to see specific components within a cell.
- Fluorescence microscopy revealed the location of the virus within the tissue.
"Fluorescence quenching": A process that decreases the fluorescence intensity of a substance.
- The addition of the chemical caused fluorescence quenching, indicating a molecular interaction.
Variants and Related Words
Fluoresce (verb): To exhibit or produce fluorescence.
- Certain dyes fluoresce brightly when exposed to blue light.
Fluorescent (adjective):
- Having the property of fluorescence.
- The fluorescent dye was injected into the bloodstream.
- (Commonly) Referring to a lamp that produces light via fluorescence.
- The office was lit by fluorescent lights.
Fluorophore (noun): A component of a molecule that causes it to fluoresce.
- The researcher attached a fluorophore to the antibody to track its movement.
Synonyms
- Luminescence: A broader term for the emission of light not resulting from heat, which includes fluorescence and phosphorescence.
- Glow: A general, non-technical term for emitting light, often used informally to describe fluorescence.
Related Phrases and Compounds
- Fluorescence in situ hybridization (FISH): A laboratory technique used to detect and localize specific DNA sequences on chromosomes.
- Fluorescence resonance energy transfer (FRET): A mechanism describing energy transfer between two light-sensitive molecules.
- X-ray fluorescence: The emission of characteristic "secondary" X-rays from a material that has been excited by high-energy X-rays.
Noun
-
light emitted during absorption of radiation of some other (invisible) wavelength
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