🚀 go-pugleaf

On May 2, 12:34 am, Pentcho Valev <pva...@yahoo.com> wrote:
> Consider one of Einsteiniana's demonstrations of superluminal (moving
> faster than c=300000km/s) signals:
>
> http://gregegan.customer.netspace.net.au/APPLETS/20/20.html
>
> Any Einsteinian would tell you that, although superluminal signals
> travel faster than c=300000km/s, they do not violate Einstein's
> relativity. Then the Einsteinian may refer you to some of the numerous
> idiotic explanations of this non-violability devised in Einsteiniana.
> Perhaps the most idiotic one is: Superluminal signals cannot violate
> relativity because they carry no information. You are shocked, first
> by the oxymoron "signal carrying no information", then by the
> breathtaking ability of Einstein's relativity to distinguish between
> "signals carrying no information" and other signals, somewhat more
> dangerous, that do carry some information.
>
> Now ignore superluminal signals and just take a look at the wave as it
> travels towards the observer (receiver). Then imagine that the
> observer suddenly starts moving against the wave. The frequency he
> measures will obviously increase and....what else will change? Perhaps
> the speed of the wave (relative to the observer) will increase?
> Perhaps the wavelength will decrease? What does the picture predict?
>
> Einsteinians clearly see that the wavelength is independent of the
> speed of the observer (that is, will remain constant) but would tell
> you that it will decrease. So they would save relativity.
>
> Honest scientists also see that the wavelength is independent of the
> speed of the observer (that is, will remain constant) and would tell
> you that the speed of the wave (relative to the observer) will
> unavoidably increase. So they would kill relativity.
>
> The crucial question is: Why are honest scientists silent in
> Einstein's world?
>
> Pentcho Valev
> pva...@yahoo.com

I honestly couldn't make sense of any of that.  Phase waves can
propagate faster than c.  Any information carried by them only
propagates at c maximum. The events are not lightlike.  For instance
consider two events A and B separated by a distance r.  If these
events are simultaneous wrt frame K, then they are not lightlike
events. What this means is that these events are not causally
related.  The event at A had no effect on the event at B, and vice
versa.  The information of the event A requires at time interval of r/
c to reach B.  If you make these events nonsimultaneous, but such that
they are still outside of each others lightcones, and then add a
number of other such events so as to form the equivalent of a stadium
wave, then you get a "phase wave" with a velocity greater than c.  But
there is nothing actually moving between these events, other than some
figment of your imagination.  To speculate that there is something
being transported by the phase wave is fully equivalent to stating
that there is something propagated instantaneously between any two
simultaneous events, even though these events have no causal
relationship to one another.