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<DIV><FONT color=#000080 size=2 face=Arial>Albrecht,</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial>I'd agree with all that you say
here. I'd add just one reminder, of what we've talked about
before.</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial>For the 'unique absolute rest frame'
to fully stand up to scrutiny in the light of experimental findings of SR, it's
not only necessary to show that an observer in a moving frame would be led to
believe from observation that their frame is static - it's also necessary to
show that this moving observer would perceive the SAME degree of (a) time
dilation and (b) length contraction in the absolutely static frame as would be
seen from that static frame in the observer's frame (those two effects are of
course NOT objective realities in the static frame, they are perceived by the
moving observer as a consequence of their OWN motion).</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial>To show that the moving observer
perceives themself as static is relatively (!!) easy; to show that they perceive
an actually-static frame as subject to relativistic effects takes a little more
thought - but it can be done, and shown to be so. [This is what I have
referred to previously as 'reciprocity'.]</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial>In addition, of course, it needs to
be - and CAN be - shown how EVERY experimental finding that's considered to be
evidence for frame symmetry can be fully explained without any need for, or
reference to, frame symmetry.</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial>No paradoxes - just a little more
thought than most physicists appear to have wished to put into explaining the
'how' of Relativity (which is what I always thought physics was actually about -
explaining the 'how'?)</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial>All of this is shown in detail in my
latest book, published last year.</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial></FONT> </DIV>
<DIV><FONT color=#000080 size=2 face=Arial>Best regards,</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Arial>Grahame</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=phys@a-giese.de href="mailto:phys@a-giese.de">Albrecht Giese</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=general@lists.natureoflightandparticles.org
href="mailto:general@lists.natureoflightandparticles.org">general@lists..natureoflightandparticles.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, July 07, 2017 9:06 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [General] JW on STR twin
Paradox</DIV>
<DIV><BR></DIV>
<P>Chip,</P>
<P><BR></P>
<P>I also think that it is the easiest and most physical way to understand
relativity in general and dilation in particular, if one assumes that there is
an absolute frame of rest, and that the motion with respect to this frame
causes (among other phenomena) dilation. But it is a specific property of
relativity that every observer in any inertial frame can assume that his frame
is the frame at rest. And in his observation the physical world behaves indeed
as if his frame would be the absolute frame at rest.</P>
<P><BR></P>
<P>This sounds like a paradox at the first glance. But with a proper use of
the Lorentz transformation it can be explained why it is this way. It is a bit
of work to make these calculations, but it is possible and one may say that
this work is a necessity to understand special relativity.</P>
<P><BR></P>
<P>Albrecht</P>
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