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Dr Transport, thanks! Did I get it right that k is meant to be here the extinction coefficient of the material not of the absorbing particles? So if i have k=0.07 for light with wavelength = 400 nm, then I get the following expression for attenuated light: I1 = I0* exp(-path_length * 0.01 *...

Hi! I am looking for help with understanding how to specify correct absorbance values for my little study project of modeling attenuation of light in a material. Here are the sources that I am using: 1) The Wikipedia article http://en.wikipedia.org/wiki/Beer-Lambert_law states that...