de Glossar


Attenuation of the radiant flux when light is passed through a clear medium.

If light of suitable wavelength is passed through a sample, part of the energy is transmitted to the molecules. As a result, the emergent beam Fex has less energy than the incident beam Fin.


The amount of light absorbed generally follows the Lambert-Beer Law and is therefore proportional to the number of absorbing molecules and the path length traversed (d).  Absorption spectroscopyExtinction.

If the medium contains turbidity matter, additional attentuation is caused as a result of light scattering.  Scattered light.

Terms related to absorption spectroscopy



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