Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site pyuxt.UUCP Path: utzoo!watmath!clyde!burl!ulysses!gamma!pyuxww!pyuxt!marcus From: marcus@pyuxt.UUCP (M. G. Hand) Newsgroups: net.cooks,net.flame Subject: Re: Truth in Advertising? Message-ID: <216@pyuxt.UUCP> Date: Mon, 12-Nov-84 19:09:15 EST Article-I.D.: pyuxt.216 Posted: Mon Nov 12 19:09:15 1984 Date-Received: Tue, 13-Nov-84 19:10:34 EST References: <2559@dartvax.UUCP>, <642@watdcsu.UUCP> Organization: Bell Communications Research, Piscataway N.J. Lines: 15 >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. >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. Is this why my physics book used to talk of "black body radiation" with the same reverence that it used for "perfectly elastic spheres." I think black is the *best* radiator. Marcus Hand (pyuxt!marcus)