Re: Twin paradox revisited ll
- From: "Martin Hogbin" <goatREMOVETHIS123@xxxxxxxxxx>
- Date: Sun, 15 Jul 2007 10:10:16 +0100
<cosmosco@xxxxxxxxxxxxxxx> wrote in message news:1184459344.132792.294170@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Jul 14, 7:49 pm, "Martin Hogbin" <goatREMOVETHIS...@xxxxxxxxxx>
wrote:
You wrote that...
Why not place your response directly under my text to
save you having to repeat it?
...if each twin were to measure the aging of the other,
making allowance for the transit time of light or radio or whatever
measurement medium they used, they would each measure the other to be
aging slower during the cruise phase of the flight.
This is, of course, based on the doppler effect
No, it has little to do with the Doppler effect.
whereby those messages
are blue shifted from both points of view and is related to the above
mentioned concept that observation creates reality. The question is,
are they both physically aging slower than each other during the
cruise phase of the flight
Yes, they are.
or is this nothing more than a visual
illusion created by changing perspectives?
No.
In his book 'An Introduction to the Special Theory of Relativity'
Professor Robert Katz wrote that according to physics, reality is
determined by what has been measured i.e. that observation
(determination) creates reality.
Agreed.
Whilst both observers measure (or determine) that the other person is
aging at a slower rate than themselves this obviously cannot represent
reality. They cannot both be aging at the same slower rate than each
other
Why not?
otherwise they are aging at the same rate as each in other...
No, they each measure the other to be aging more slowly.
...words
- the twin paradox.
You also wrote that as the traveller turns around, the inertial twin
would measure the travelling twin's time to return to normal as the
traveller came to a stop and then run more slowly again as the
traveller accelerated to begin their return journey.
So although the inertial twin now sees blue shift of the ship's image
he is still of the opinion that the traveler's clock is ticking over
at a slower rate than his own clock irrespective of the fact that he
previously arrived at the same conclusion on the basis of the red
shift of the departing ship's image/radio messages.
Blue and red shift have nothing to do with it. They are what the
inertial twin _sees_.
How can he determine slow running of the traveler's clock on the basis
of the red shift of that image and on the basis of the blue shift of
that image?
By knowing what the cause of Doppler shift is and making the
necessary corrections.
Whilst you have answered my question regarding an interpretation that
has been completely accepted by the scientific community that
interpretation does not, in my opinion, make sense.
That is because you choose to believe your own preconceptions,
based on everyday experience, rather than the experimental
evidence.
--
Martin Hogbin
.
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