Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84 exptools; site ihlpg.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!ihnp4!ihlpg!tan From: tan@ihlpg.UUCP (Bill Tanenbaum - AT&T Bell Labs - Naperville IL) Newsgroups: net.physics Subject: Re: Light Message-ID: <774@ihlpg.UUCP> Date: Mon, 8-Jul-85 19:24:44 EDT Article-I.D.: ihlpg.774 Posted: Mon Jul 8 19:24:44 1985 Date-Received: Tue, 9-Jul-85 07:07:09 EDT References: <345@sri-arpa.ARPA> <778@inuxd.UUCP> <773@ihlpg.UUCP> Organization: AT&T Bell Laboratories Lines: 12 > You are incorrect in several respects. The speed of light in vacuum IS > constant, i. e. the same to all observers. Light traveling from the earth > to the moon is red-shifted due to the difference in gravitational potential, > and light travelling from the earth to the moon is blue-shifted for the ^^^^^^^^^^^^^^^^^ > same reason. The travel times, however, are frequency independent (assuming > transmission in vacuum) and the same in both directions. General relativity > does account for the frequency shifting. Whoops. that should have been moon to the earth. Sorry. -- Bill Tanenbaum - AT&T Bell Labs - Naperville IL ihnp4!ihlpg!tan