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  2. Beer–Lambert law - Wikipedia

    en.wikipedia.org/wiki/BeerLambert_law

    The extinction law's primary application is in chemical analysis, where it underlies the BeerLambert law, commonly called Beer's law. Beer's law states that a beam of visible light passing through a chemical solution of fixed geometry experiences absorption proportional to the solute concentration .

  3. Molar absorption coefficient - Wikipedia

    en.wikipedia.org/wiki/Molar_absorption_coefficient

    The absorbance of a material that has only one absorbing species also depends on the pathlength and the concentration of the species, according to the BeerLambert law =, where ε is the molar absorption coefficient of that material; c is the molar concentration of those species; ℓ is the path length.

  4. Isosbestic point - Wikipedia

    en.wikipedia.org/wiki/Isosbestic_point

    The absorbance can be written as sum of absorbances of each species (BeerLambert law) = = (), where the concentration of species i, the optical path length. By definition, an isosbestic point can be interpreted as a fixed linear combination of species concentrations, L = ∑ i n b i c i , d L d t = 0 , {\displaystyle L=\sum _{i}^{n}b_{i}c_{i ...

  5. Variable pathlength cell - Wikipedia

    en.wikipedia.org/wiki/Variable_pathlength_cell

    The BeerLambert law states that there is a logarithmic dependence between the transmission (or transmissivity), T, of light through a substance and the product of the absorption coefficient of the substance, α, and the distance the light travels through the material (i.e. the path length), ℓ.

  6. Absorption (electromagnetic radiation) - Wikipedia

    en.wikipedia.org/wiki/Absorption_(electromagnetic...

    This may be related to other properties of the object through the BeerLambert law. Precise measurements of the absorbance at many wavelengths allow the identification of a substance via absorption spectroscopy, where a sample is illuminated from one side, and the intensity of the light that exits from the sample in every direction is measured.

  7. Atomic absorption spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Atomic_absorption_spectroscopy

    The technique makes use of the atomic absorption spectrum of a sample in order to assess the concentration of specific analytes within it. It requires standards with known analyte content to establish the relation between the measured absorbance and the analyte concentration and relies therefore on the BeerLambert law.

  8. Atomic spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Atomic_spectroscopy

    The relationship between the concentration of atoms, the distance the light travels through the collection of atoms, and the portion of the light absorbed is given by the BeerLambert law. In atomic emission spectroscopy , the intensity of the emitted light is directly proportional to the concentration of atoms.

  9. Attenuation - Wikipedia

    en.wikipedia.org/wiki/Attenuation

    In optics and in chemical spectroscopy, this is known as the BeerLambert law. In engineering, attenuation is usually measured in units of decibels per unit length of medium (dB/cm, dB/km, etc.) and is represented by the attenuation coefficient of the medium in question. [1]