From: "Andy Robertson"
Subject: Re: (urth) FTL Travel Date: Mon, 18 Nov 2002 19:48:49 -0000 This is not quite accurate. What is accurate is that travelling FTL in one inertial frame, from the point of view of one observer, will **always** be travelling back in time in another inertial frame, from the point of view of another observer. God may see the universe as a four-dimensional whole, as has been discussed. Travelling FTL requires that you have the vision of God - that you see time, not as a progression, but as a dimension ----- Original Message ----- From: "Roy C. Lackey" To: "urth" Sent: Monday, November 18, 2002 7:09 PM Subject: Re: (urth) FTL Travel > 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 > > > -- > > --