decadic absorbance
Sign in to saveAlso known as transmittance optical density, optical density, transmittance density, absorbance, spectral decadic absorbance
In spectroscopy, absorbance (abbreviated as A) is a logarithmic value which describes the portion of a beam of light which does not pass through a sample. Whilst the name refers to the absorption of light, other interactions of light with a sample (reflection, scattering) may also contribute to attenuation of the beam passing through the sample. The term "internal absorbance" is sometimes used to describe beam attenuation caused by absorption, while "attenuance" or "experimental absorbance" can be used to emphasize that beam attenuation can be caused by other phenomena.
~12 min read
Article
15 sectionsContents
- History and uses of the term absorbance
- Beer-Lambert law
- Absorbance for non-scattering samples
- Absorbance for scattering samples
- Optics
- Mathematical definitions
- Absorbance of a material
- Spectral absorbance
- Relationship with attenuation
- Attenuance
- Attenuation coefficient
- Use in Analytical Chemistry
- Shade number
- See also
- References
In spectroscopy, absorbance (abbreviated as A) is a logarithmic value which describes the portion of a beam of light which does not pass through a sample. Whilst the name refers to the absorption of light, other interactions of light with a sample (reflection, scattering) may also contribute to attenuation of the beam passing through the sample. The term "internal absorbance" is sometimes used to describe beam attenuation caused by absorption, while "attenuance" or "experimental absorbance" can be used to emphasize that beam attenuation can be caused by other phenomena.
== History and uses of the term absorbance ==