|Message: Re: Absorption units in OpNovice||Not Logged In (login)|
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First you need to know what is the physical theory behind the coefficient of absorption of a material, for this i recommend you to read the book from Griffiths about electrodynamics. Well for be precise there is a energy or wavelength (you can write one in terms of the another with E=hf=hc/lambda) for every absorption coefficient and diffraction coefficient.thats why in the detector construction in the example OpNovice you see a energy of photon for every absorption and diffraction values, so the equation for find absorption coefficient is alpha=4pik/lambda, but that is the absorption coefficient, to find the value of absorption length is simply 1/alpha so is 1/alpha=lambda/4pik. with the energy instead of lambda you have 1/alpha=hc/4pikE, where k is the extinction coefficient, you have this experimental values (diffraction values for wavelength and extinction values.) for some materials here: https://refractiveindex.info/ (google is your best friend!) If you don't understand me or the book you can question about this,almost every person that know about optical physics.
I hope this help you.
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