Absorptance
Absorptance
Absorptance (/əbˈsɔːrptəns/), also known as absorbance or absorption coefficient, is a measure of the amount of light or other electromagnetic radiation that a material absorbs at a given frequency.
Etymology
The term "absorptance" is derived from the Latin word absorbere, which means "to swallow up". The suffix "-ance" is used to form nouns from verbs, indicating a state or condition.
Definition
In Physics, absorptance is defined as the ratio of the absorbed radiant power to the incident radiant power. It is a dimensionless quantity, and its value lies between 0 and 1. A value of 0 indicates that the material does not absorb any radiation, while a value of 1 indicates that the material absorbs all incident radiation.
Related Terms
- Absorption (physics): The process by which the energy of a photon is taken up by matter, typically the electrons of an atom, and re-emitted in the form of light.
- Transmittance: The fraction of incident light or radiation that passes through a material.
- Reflectance: The fraction of incident light or radiation that is reflected by a material.
- Optical depth: A measure of transparency, or the extent to which a material will allow light or other electromagnetic radiation to pass through it.
See Also
External links
- Medical encyclopedia article on Absorptance
- Wikipedia's article - Absorptance
This WikiMD dictionary article is a stub. You can help make it a full article.
Languages: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
Urdu,
বাংলা,
తెలుగు,
தமிழ்,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
European
español,
Deutsch,
français,
русский,
português do Brasil,
Italian,
polski