Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: Notesfiles $Revision: 1.7.0.10 $; site uiucdcsb Path: utzoo!watmath!clyde!cbosgd!ihnp4!inuxc!pur-ee!uiucdcsb!carroll From: carroll@uiucdcsb.CS.UIUC.EDU Newsgroups: net.space Subject: Re: Unified Field Theory and space trav Message-ID: <15700024@uiucdcsb> Date: Tue, 12-Nov-85 16:09:00 EST Article-I.D.: uiucdcsb.15700024 Posted: Tue Nov 12 16:09:00 1985 Date-Received: Thu, 14-Nov-85 00:46:46 EST References: <1024@decwrl.UUCP> Lines: 16 Nf-ID: #R:decwrl.UUCP:-102400:uiucdcsb:15700024:000:809 Nf-From: uiucdcsb.CS.UIUC.EDU!carroll Nov 12 15:09:00 1985 For math types, the important quantity is sqrt(1-(v/c)**2). If we call that R, then time, mass, and length change as follows, from the viewpoint of someone on EARTH! Please note, everything depends on who is the observer. T' = T * R M' = M / R L' = L * R Where T',M',L' are what you see while the voyagers are traveling rapidly, and T,M,L are what they were just before they left. So, when v is close to c, one hour on Earth (T) becomes a very small amount of time on the ship (T'). The inevitable question is: "I thought it was all relative, why don't the voyagers see Earth as running slow in time?", or the Twins Paradox. The answer is that someone (the voyagers) accelerated, and the other people didn't, and that distinguishes them. Accleration and gravity slow down clocks too, just like high speeds.