
Re: CLEVER EINSTEINIANS AND SPECIAL RELATIVITY
Posted:
Jan 15, 2013 3:23 AM


How very clever Einsteinians abandon special relativity, the root of all the evil in physics, without abandoning it:
http://www.pbs.org/wgbh/nova/physics/blog/author/fwilczek/ Frank Wilczek: "Einstein's special theory of relativity calls for radical renovation of commonsense ideas about time. Different observers, moving at constant velocity relative to one another, require different notions of time, since their clocks run differently. Yet each such observer can use his "time" to describe what he sees, and every description will give valid results, using the same laws of physics. In short: According to special relativity, there are many quite different but equally valid ways of assigning times to events. Einstein himself understood the importance of breaking free from the idea that there is an objective, universal "now." Yet, paradoxically, today's standard formulation of quantum mechanics makes heavy use of that discredited "now." Playing with paradoxes is part of a theoretical physicist's vocation, as well as highclass recreation. Let's play with this one. (...) As we've seen, if a and b are spacelike separated, then either can come before the other, according to different moving observers. So it is natural to ask: If a third event, c, is spacelike separated with respect to both a and b, can all possible timeorderings, or "chronologies," of a, b, c be achieved? The answer, perhaps surprisingly, is No. We can see why in Figures 5 and 6. Rightmoving observers, who use upsloping lines of constant time, similar to the lines of constant t2 in Figure 2, will see b come before both a and c (Figure 5). But c may come either after or before a, depending on how steep the slope is. Similarly, according to leftmoving observers (Figure 6), a will always come before b and c, but the order of b and c varies. The bottom line: c never comes first, but other than that all timeorderings are possible. These exercises in special relativity are entertaining in themselves, but there are also serious issues in play. They arise when we combine special relativity with quantum mechanics."
Pentcho Valev

