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*To*: starship-design@lists.uoregon.edu*Subject*: Re: starship-design: stuff*From*: Steve VanDevender <stevev@efn.org>*Date*: Fri, 9 Jan 1998 21:09:12 -0800*In-Reply-To*: <Pine.LNX.3.95.980109231207.472B-100000@geeky1.ebtech.net>*References*: <Pine.A32.3.91.980110010814.6607A-100000@alf.zfn.uni-bremen.de><Pine.LNX.3.95.980109231207.472B-100000@geeky1.ebtech.net>*Reply-To*: Steve VanDevender <stevev@efn.org>*Sender*: owner-starship-design@lists.uoregon.edu

Paul Anderson writes: > On Sat, 10 Jan 1998, Christoph Kulmann wrote: > > YES, time slows down as you approach c, and AT c it stops! > Consider: You can halve 1 an inifite number of times, and NEVER reach 0. > I don't think time REALLY stops at c, I think it just gets slower and > slower, until it's proceeding at an infinitesimal rate. This is again not a correct description of relativistic time effects. Relativistic time dilation is a difference in the measured rate of time lapse between two observers in relative motion. Each observer considers his own clocks to lapse at the rate of one second per second; there is no subjective effect that causes the observers to feel that their rate of time lapse is changing. However, when the two observers compare clock rates, one observer, in one of his clock's seconds, will see the other's clock tick off only sqrt(1 - v^2/c^2) seconds, where v is the relative velocity of the two observers and c is the speed of light. Again, this is all explained in _Spacetime Physics_.

**References**:**Re: starship-design: stuff***From:*Christoph Kulmann <kulmann@zfn.uni-bremen.de>

**Re: starship-design: stuff***From:*Paul Anderson <madhobbyist@geeky1.ebtech.net>

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