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Concept information

... > physical process > energy absorption > radiation absorption > electromagnetic absorption > optical absorption > optical thickness

Terme préférentiel

optical thickness  

Définition(s)

  • In physics, optical depth or optical thickness is the natural logarithm of the ratio of incident to transmitted radiant power through a material. Thus, the larger the optical depth, the smaller the amount of transmitted radiant power through the material. Spectral optical depth or spectral optical thickness is the natural logarithm of the ratio of incident to transmitted spectral radiant power through a material. Optical depth is dimensionless, and in particular is not a length, though it is a monotonically increasing function of optical path length, and approaches zero as the path length approaches zero. The use of the term "optical density" for optical depth is discouraged. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Optical_depth)

Concept(s) générique(s)

Synonyme(s)

  • optical depth

Traductions

URI

http://data.loterre.fr/ark:/67375/MDL-PD19ND43-8

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RDF/XML TURTLE JSON-LD Dernière modif. 21/09/2022