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Lighting Design Glossary

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Extinction Coefficient

(Term of optics)

The fraction of light lost to scattering and absorbtion per unit distance in a participating medium. The sum of the absorption coefficient and the scattering coefficient.

Standard unit of the extinction coefficient is fraction per meter (/m).

The Radiance software treats the extinction coefficient of the red, blue and green components of the extinction coefficient seperately.


   absorption coefficient
participating medium
scattering coefficient
Radiance software
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extinction coefficient    Der Extinktionskoeffizient
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