From: "Roy C. Lackey"
Subject: Re: (urth) FTL Travel Date: Mon, 18 Nov 2002 13:09:35 -0600 Crush quoted and wrote: >Don asks: >Please explain. Is this the usual SF take on FTL or is there a physics >explanation that makes backward time travel the most likely? I'm pretty >ignorant on this. > >Crush responds: >As one moves faster and approaches the speed of light, time slows down, >exponentially, until time stops at the speed of light. I am informed by >Stephen Hawking (not personally) that it takes an infinite amount of time >and an infinite amount of energy to reach the speed of light. > >It is simple mathematics that as one moves faster than the speed of light, >time moves in the opposite direction. No doubt, there are other mathematical >models. > >Hence, a FTL generation ship is unnecessary. Thanks for taking the question. I would only add that, in the wake of Einstein's (and other's) theories, such theoretical considerations spawned someone to pen a limerick several generation ago. (From memory.) "There was a young lady named Bright, who traveled far faster than light. She set out one day, in a Relative way, and returned home the previous night." -Roy --