Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!ihnp4!zehntel!hplabs!sri-unix!MJackson.Wbst@XEROX.ARPA 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