From: utzoo!mark Newsgroups: net.misc Title: Re: Clock Problem Article-I.D.: utzoo.2774 Posted: Fri Jan 21 19:54:01 1983 Received: Fri Jan 21 19:54:01 1983 References: utcsrgv.915 the problem's solution (that the "clock" is only a display for a distant, fixed, clock) has already been posted by several people. to those claiming that special relativity does not apply, since the clock is accelerated: this is true, but the motion still causes time dilation, AND THE ACCELERATION DOES TOO. if you swung a real clock about your head, it would lose time faster than SR alone leads you to expect. the experiment was done some years ago (sorry, i have no references): someone carried an atomic clock around the world by commercial airliner. it lost time wrt the one left on the ground. mARK bLOORE univ. of toronto