Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 ggr 02/21/84; site bocar.UUCP Path: utzoo!decvax!bellcore!allegra!ulysses!mhuxr!ihnp4!bocar!man From: man@bocar.UUCP (M Nevar) Newsgroups: net.audio Subject: Re: Why is only one side of a compact disk used? Message-ID: <127@bocar.UUCP> Date: Thu, 25-Apr-85 09:20:53 EST Article-I.D.: bocar.127 Posted: Thu Apr 25 09:20:53 1985 Date-Received: Thu, 25-Apr-85 14:48:10 EST References: <106@daisy.UUCP> Distribution: na Organization: AT&T Bell Laboratories, Piscataway Lines: 5 The reason only one side of the compact disk is used is because the laser reads from the bottom of the disk and the image of the 'pit or valley' is reflected off the disk. If both sides were 'reflectable', the laser couldn't read either side.