Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watmath!clyde!rutgers!cmcl2!husc6!necntc!frog!john From: john@frog.UUCP Newsgroups: sci.misc Subject: Re: Color Message-ID: <1961@frog.UUCP> Date: Fri, 4-Dec-87 16:58:00 EST Article-I.D.: frog.1961 Posted: Fri Dec 4 16:58:00 1987 Date-Received: Wed, 9-Dec-87 21:13:35 EST References: <162300002@uiucdcsb> Organization: Superfrog Heaven [ CRDS, Framingham MA ] Lines: 23 In article <162300002@uiucdcsb>, kadie@uiucdcsb.cs.uiuc.edu writes: > I've got two miscellaneous science questions. > 1) On TV's and computers screens, why is it RGB (red, green, blue) > instead of RYB (red, yellow, blue) the primary colors? Red, yellow, and blue are the primary *pigments*, which work by absorbing the contrasting primary light colors. > 2) Some light wave length produces the color green. A mixture of > the wave lengths of blue and yellow also produces green. > Even though these two greens are indistinguishable to our eyes, are there > (could there be) instruments that distinguish them? A prism. Real green light in, green light out. Apparent green light in, blue and yellow lines out. -- John Woods, Charles River Data Systems, Framingham MA, (617) 626-1101 ...!decvax!frog!john, ...!mit-eddie!jfw, jfw@eddie.mit.edu "Cutting the space budget really restores my faith in humanity. It eliminates dreams, goals, and ideals and lets us get straight to the business of hate, debauchery, and self-annihilation." -- Johnny Hart