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From: MJackson.Wbst@XEROX.ARPA
Newsgroups: net.physics
Subject: Re: Colors: one more time
Message-ID: <12548@sri-arpa.UUCP>
Date: Fri, 17-Aug-84 10:02:00 EDT
Article-I.D.: sri-arpa.12548
Posted: Fri Aug 17 10:02:00 1984
Date-Received: Mon, 20-Aug-84 01:18:13 EDT
Lines: 15

Pretty touchy, aren't we?

I thought that ihima!cmb's response to your original message was quite
reasonable.  If, as you say, you do indeed "understand color vision"
then you should understand that it is not true that the human eye can
only "detect three frequencies," "SIMULTANEOUSLY" or not.  What is, of
course, true is that the (normal) human eye seems to take three
different weighted samples across the visible spectrum.  Thus any color,
whatever its spectral content, is describable by three "color
coordinates," such as the hue, value (lightness), and chroma of the
Munsell system.  If you don't think your "three frequencies" statement
is misleading then you know less about discourse than about color
vision.

Mark