Re: Science Teacher Needs Help!

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#28

From: Pieter Kuiper
Date: Tue, 09 Dec 1997 00:00

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Kevin Luttrell wrote:

> 3) Then there's scattering. Are the frequencies that get emitted the same
> ones that were absorbed? 

Absorption and scattering are related through the Kramers-Kronig
transform. If you know the absorption spectrum (the imaginary part of
the refractive index), you can calculate the real part. All materials
absorb somewhere in the UV, and this is related to the refractive index
(the real part) in the visible generally increasing toward the UV
(Cauchy's equation n=A+B/wavelength^2).

In the energy region just above absorption resonances there is
"anomalous dispersion": the refractive index is higher for longer
wavelenghts.

-- 
Pieter.Kuiper@itn.hh.se            http://www.hh.se/staff/piku/

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From: Pieter Kuiper <Pieter.Kuiper@fysik.uu.se>
Subject: Re: Science Teacher Needs Help!
Date: 1997/12/09
Message-ID: <66i9dq$s8u$1@agate.berkeley.edu>
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To: Kevin Luttrell <kevl@flash.net>
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