knutsen@SRI-UNIX@sri-unix (08/13/82)
From: Andrew Knutsen <knutsen@SRI-UNIX> I received about 20 requests, so the list "Physics@SRI-Unix" now exists. Hopefully this will redirect some of the not-entirely- relevant material. Requests to Physics-request@SRI-Unix. The problem with replies to usenet sites is somewhat of a mystery to me too, since it works for me (except in pathological cases caused by a bug which resulted in very long routes). It is possible that some originating mailsystems dont handle the address strings correctly, or that the gateway at UCB (which I dont know much about) is doing something odd. In any case if you send me your undeliverable mail, Ill see if I can figure it out. Regarding FTL travel, it seems to me that the subject is very closely tied with time travel. Time dilation at relativistic speeds results in the people aboard the ship seeming to travel FTL; its just that when they get back to their original reference-frame everybody they knew is dead and buried. If they could go back in time, everything would be fine, right? This makes the causality problems a bit clearer once youve accepted time dilation, which has been pretty well proven experimentally using decay rates of slow and fast particles. Hubble's red-shift can also be interpreted as a time-dilation effect I think.