Re: Twin paradox resolved - big error in Relativity !

N:dlzc D:aol T:com (dlzc) wrote:
> Dear Thomas:

> > It seems you haven't read my previous post (25) above. The
> > example
> > given on my page
> > http://www.physicsmyths.org.uk/timedilation.htm does
> > not depend on any signal propagation time.
>
> I have read it. The example on the webpage uses the word
> "simultaneous". In the usual definition, this involves light
> propagation. Define it so that it is not.

First of all, simultaneity is not an explicit issue for the thought
experiment suggested on my page
http://www.physicsmyths.org.uk/timedilation.htm . It is merely given
implicity by the symmetry of the design. Effectively it is equivalent
to the fact that if two objects collide they have two be at a certain
point in space at the same time (otherwise there would obviously be no
collision). For Einstein, the simultaneity issue arises only because a)
he uses light signals for communication and b) he mistakenly assumes
that the speed of light is subject to a vectorial velocity addition
like ordinary objects (I have discussed the 'simultaneity' issue in
somewhat more detail on my page
http://www.physicsmyths.org.uk/discussions/relativity2.htm (see my
discussion with John Ryskamp towards the bottom of the page)).

> Note that the "speed
> of sound" in a material (the fastest that one can transmit a
> "material signal") is still a function of c.

As I have said before, the speed of the signal in the material is
irrelevant here. It does not change the clock readings as the delay is
the same in both systems (even if the length of both rods is different,
it would merely produce a constant offset of the clocks which would be
known and could be corrected accordingly).


> 4) your "charge" mystery is your ignorance.

The fact that I mentioned experimental evidence purporting to
demonstrate time dilation effects shows that I am not ignorant in this
respect, but it is obvious that if a time dilation is logically
impossible (as I think I have shown with my particular 'twin paradox'
thought experiment), it is merely a matter of trying to find
alternative explanations for these (observations and experiments can't
prove what's logically impossible).

Thomas

.

Relevant Pages

  • Re: Twin paradox resolved - big error in Relativity !
    ... simultaneity is not an explicit issue for the thought ... he uses light signals for communication and b) he mistakenly assumes ... > 4) your "charge" mystery is your ignorance. ... demonstrate time dilation effects shows that I am not ignorant in this ...
    (sci.physics.relativity)
  • Re: Little guy on the train
    ... > point of observation or effect as this medium detail effects simultaneity. ... nonsimultaneity because of the different media the light signals have ... > | This is why I mentioned the lifetime of the muon. ... I'm not sure what you mean by "identical observation space/time path ...
    (sci.physics.relativity)
  • Re: Simultaneity by PeRi
    ... signals from the events were received were equal. ... mark where the event occurred and the mark where the receiver sat. ... transmit the event to an observer at a different location. ... Simultaneity can be determined by ...
    (sci.physics.relativity)
  • Re: Simultaneity by PeRi
    ... signals from the events were received were equal. ... Note there are no clocks involved whatsoever. ... transmit the event to an observer at a different location. ... Simultaneity can be determined by ...
    (sci.physics.relativity)
  • Re: signal detection in doppler
    ... is really a time dilation. ... frequency shift. ... but normally the PN, LFM, HFM signals have fairly broad ambiguity ... need that many doppler replicas to find a peak. ...
    (comp.dsp)
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