Hello,
this is tutorial of simulating laser heating using comsol using lambert beer law, well i think there is two mistakes, the first one is the sign minus in the lambert beer law , Iz=-alpha(T)*I which will give the eq Iz+alpha(T)*I
the second is that Iz is always negatif , so Q should equal -Iz not Iz
https://www.comsol.com/blogs/modeling-laser-material-interactions-with-the-beer-lambert-law/?rnd=665561
thank you for fast reply
I suppose that your expression is OK. It means the laser intensity decay in a matter: dI/dz=-alpha*I that gives after integration the intensity distribution along z axis I(z)=I0exp(-alpha*z). The minus means that the laser intensity drops inside the target.
thank you very much for all your answers, the minus sing was droped off because of the assumption that the laser beam propagates in the inverse z axis
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