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Forum: Processes Involving Optical Photons
Re: Question Absorption units in OpNovice (Jaiver Salazar )
Re: None Re: Absorption units in OpNovice (Daren Sawkey)
Re: None Re: Absorption units in OpNovice (Jaiver Salazar )
Re: None Re: Absorption units in OpNovice (fafu)
Date: 09 Nov, 2017
From: Jaiver Salazar <Jaiver Salazar >

Hi Fafu.

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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1 Agree: Re: Absorption units in OpNovice   (fafu - 10 Nov, 2017)
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