Extinction coefficient

Extinction coefficient refers to several different measures of the absorption of light in a medium:


 * Attenuation coefficient, sometimes called "extinction coefficient" in meteorology or climatology
 * Mass extinction coefficient, how strongly a substance absorbs light at a given wavelength, per mass density
 * Molar extinction coefficient, how strongly a substance absorbs light at a given wavelength, per molar concentration
 * Optical extinction coefficient, the imaginary part of the complex index of refraction