From: utzoo!decvax!harpo!npoiv!alice!rhm Newsgroups: net.physics Title: Re: General Relativity Paradox (?) Article-I.D.: alice.1508 Posted: Thu Feb 17 21:05:36 1983 Received: Tue Feb 22 03:19:39 1983 References: sri-arpa.453 aluxz.1107 Hey, this is great physics. An observer sees a photon emitted from a box; an observer travelling with the box doesn't see it. Wow! I'm told that I can't tell the difference between uniform acceleration, and gravitational acceleration, despite the enormous tidal effects from the latter. That's not the way my third grade teacher told it to me.