Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site watdcsu.UUCP Path: utzoo!watmath!watdcsu!haapanen From: haapanen@watdcsu.UUCP (Tom Haapanen [DCS]) Newsgroups: net.cooks,net.flame Subject: Re: Truth in Advertising? Message-ID: <642@watdcsu.UUCP> Date: Sun, 11-Nov-84 15:39:41 EST Article-I.D.: watdcsu.642 Posted: Sun Nov 11 15:39:41 1984 Date-Received: Mon, 12-Nov-84 19:20:49 EST References: <2559@dartvax.UUCP> Organization: U of Waterloo, Ontario Lines: 31 < Namin nami nami nami ... > I still can't believe the ignorance prevailing in journalism today! For someone to draw the conclusion that since black cars get hot in the sun, then black pots must radiate lots of waste heat is incredulous! This person should have at least consulted a basic physics text. Obviously, black absorbs the most heat, as it does not *reflect* light rays of any wavelength. On the other hand, a silver car will reflect most light rays (waves? particles?). On the other hand, an object of colour x can only radiate light (read: heat) of colour x (i.e. that wavelength). Therefore, a 100% black pot will radiate *no heat* at all. It will be warm to the touch, though. However, it is impossible to make a 100% black pot (if it was 100% black, it would absorb all the light and you wouldn't be able to see it!), but an almost-black pot is still the best way to go. :-( :-( :-( Journalism today :-( :-( :-( Tom Haapanen University of Waterloo (519) 744-2468 allegra \ clyde \ \ decvax ---- watmath --- watdcsu --- haapanen ihnp4 / / linus / The opinions herein are not those of my employers, of the University of Waterloo, and probably not of anybody else either.