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From: marcus@pyuxt.UUCP (M. G. Hand)
Newsgroups: net.physics
Subject: Re: What polishing does to the surface of rocks.
Message-ID: <155@pyuxt.UUCP>
Date: Thu, 26-Jul-84 22:54:44 EDT
Article-I.D.: pyuxt.155
Posted: Thu Jul 26 22:54:44 1984
Date-Received: Sat, 28-Jul-84 07:33:08 EDT
References: <110@mouton.UUCP>
Organization: Bell Communications Research, Piscataway N.J.
Lines: 7

A similar effect can be observed in fogs, smokes and colloids - the light is
scattered producing a whitish appearance.  There is one whole branch of
spectroscopy that depends on this phenomenon (I cannnot remember what its
called - Raman?)  Its caused when the size of the particles (roughness
of a stone) is close to a certain ratio wrt the light waves.

		Marcus Hand	(pyuxt!marcus)