"\"Molar Attenuation Coefficient\" is a measurement of how strongly a chemical species or substance absorbs or scatters light at a given wavelength, per amount of substance." . . . "Molar Attenuation Coefficient"@en . . . . "\\(\\mu_c\\)"^^ . "http://en.wikipedia.org/wiki/Mass_attenuation_coefficient"^^ . "\\(\\mu_c = -\\frac{\\mu}{c}\\), where \\(\\mu\\) is the linear attenuation coefficient and \\(c\\) is the amount-of-substance concentration."^^ . . . "http://www.iso.org/iso/catalogue_detail?csnumber=31895"^^ .