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MathGroup Archive 2001

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Re: Fresnel's Reflectivity

  • To: mathgroup at smc.vnet.net
  • Subject: [mg27411] Re: Fresnel's Reflectivity
  • From: vze295bp at verizon.net (David Reiss)
  • Date: Sun, 25 Feb 2001 00:53:33 -0500 (EST)
  • Organization: Scientific Arts
  • References: <96nvb4$jcl@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

In article <96nvb4$jcl at smc.vnet.net>, Diptabhas Sarkar
<ds579 at columbia.edu> wrote:

> Hi,
>    I am new to Mathematica. I need to fit the Fresnel's reflectivity
> theory to an experimentally generated data set. I tried nonlinear fitting.
> The problem is one of the parameters (dielectric constant of metal) is
> imaginary. This prevents mathematica from calculating the derivatives.
> 
> Any help in this regard will be very helpful
> 
> Thanks
> Sarkar

Of course you could expand the reflectivity expression
into its real and imaginary parts and fit each of these
separtaely to the experimental data for the
respective real and 
imaginary parts...

--David

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