Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!husc6!bloom-beacon!gatech!mcnc!rti!xyzzy!throopw From: throopw@xyzzy.UUCP (Wayne A. Throop) Newsgroups: sci.misc Subject: Re: Color Message-ID: <435@xyzzy.UUCP> Date: Tue, 8-Dec-87 13:30:23 EST Article-I.D.: xyzzy.435 Posted: Tue Dec 8 13:30:23 1987 Date-Received: Sun, 13-Dec-87 12:45:00 EST References: <8VicPfy00Xo3QHM08t@andrew.cmu.edu> Organization: Data General, RTP NC. Lines: 25 > jk3k+@andrew.cmu.edu (Joseph G. Keane) > Some more information about color perception: When you add two colors of > light, you get something that looks in-between but less pure. Simply not true, as Joseph's own example of "purple" shows. Adding red and violet doesn't give a yellowish-green as you might expect, but purple. Again, the above claim is simply not true in general. > So if i show > you a mixture of yellow and blue light, it will indeed look green. Then if > show you monochromatic green light, it will look more green. I take it you haven't actually tried this. If you mix yellow and blue *light*, you normally get something very like white. (This depends strongly on the exact spectrums (spectra? whatever) and intensity of "yellow" and "blue" used of course.) Now, granted, yellow and blue *pigments*, when mixed, normally yield a green *pigment*, but that's a horse of a... well, it's a different kettle of fish, anyhow. -- "Trust me. I know what I'm doing." --- Sledge Hammer -- Wayne Throop!mcnc!rti!xyzzy!throopw