The twin paradox revisited

Martin Hogbin wrote:
wrote in message ups.com...
When I previously had access to the internet about ten years ago I
expressed interest in this topic and was informed that a space
traveller does not physically age at a slower rate but that his earth-
bound twin physically ages at a faster rate and only during the period
of acceleration following turn around.

Is this idea still in vogue? Has it been published in any peer
reviewed journal?

I do not quite understand your question but there is only
one theory of space and time that has been taught and
used by physicists throughout the world for nearly a
century and that is Einstein's theory of relativity.

Various aspects of relativity have, of course, been
published in peer-reviewed journals and the theory is
completely accepted. The only dissent is in places
like this newsgroup where any crackpot is free to post.

According to relativity, the earthbound twin will be
found to have aged more than the travelling twin when
they meet up again. How the aging of each twin is
measured by the other twin during the journey is
described in many places and web sites. If you are
interested I will try to find one for you.

Try to find places where hypnotists in Einstein criminal cult say the
greater youthfulness of the travelling twin is due to the acceleration
he undergoes and places where other (or even the same) hypnotists say
the greater youthfulness of the travelling twin has nothing to do with
the acceleration. You may even find a place where a hypnotist say both
truths simultaneously.

Pentcho Valev

"Pentcho Valev" wrote in message
ups.com...
: Martin Hogbin wrote:
: wrote in message
ups.com...
: When I previously had access to the internet about ten years ago I
: expressed interest in this topic and was informed that a space
: traveller does not physically age at a slower rate but that his earth-
: bound twin physically ages at a faster rate and only during the period
: of acceleration following turn around.
:
: Is this idea still in vogue? Has it been published in any peer
: reviewed journal?
:
: I do not quite understand your question but there is only
: one theory of space and time that has been taught and
: used by physicists throughout the world for nearly a
: century and that is Einstein's theory of relativity.
:
: Various aspects of relativity have, of course, been
: published in peer-reviewed journals and the theory is
: completely accepted. The only dissent is in places
: like this newsgroup where any crackpot is free to post.
:
: According to relativity, the earthbound twin will be
: found to have aged more than the travelling twin when
: they meet up again. How the aging of each twin is
: measured by the other twin during the journey is
: described in many places and web sites. If you are
: interested I will try to find one for you.
:
: Try to find places where hypnotists in Einstein criminal cult say the
: greater youthfulness of the travelling twin is due to the acceleration
: he undergoes and places where other (or even the same) hypnotists say
: the greater youthfulness of the travelling twin has nothing to do with
: the acceleration. You may even find a place where a hypnotist say both
: truths simultaneously.
:
Are you sure it's hypnotism and not lobotomy?

Androcles wrote:
"Pentcho Valev" wrote in message
ups.com...
: Martin Hogbin wrote:
: wrote in message
ups.com...
: When I previously had access to the internet about ten years ago I
: expressed interest in this topic and was informed that a space
: traveller does not physically age at a slower rate but that his earth-
: bound twin physically ages at a faster rate and only during the period
: of acceleration following turn around.
:
: Is this idea still in vogue? Has it been published in any peer
: reviewed journal?
:
: I do not quite understand your question but there is only
: one theory of space and time that has been taught and
: used by physicists throughout the world for nearly a
: century and that is Einstein's theory of relativity.
:
: Various aspects of relativity have, of course, been
: published in peer-reviewed journals and the theory is
: completely accepted. The only dissent is in places
: like this newsgroup where any crackpot is free to post.
:
: According to relativity, the earthbound twin will be
: found to have aged more than the travelling twin when
: they meet up again. How the aging of each twin is
: measured by the other twin during the journey is
: described in many places and web sites. If you are
: interested I will try to find one for you.
:
: Try to find places where hypnotists in Einstein criminal cult say the
: greater youthfulness of the travelling twin is due to the acceleration
: he undergoes and places where other (or even the same) hypnotists say
: the greater youthfulness of the travelling twin has nothing to do with
: the acceleration. You may even find a place where a hypnotist say both
: truths simultaneously.
:
Are you sure it's hypnotism and not lobotomy?

No.

Pentcho Valev

Pentcho Valev wrote:
Androcles wrote:
"Pentcho Valev" wrote in message
ups.com...
: Martin Hogbin wrote:
: wrote in message
ups.com...
: When I previously had access to the internet about ten years ago I
: expressed interest in this topic and was informed that a space
: traveller does not physically age at a slower rate but that his earth-
: bound twin physically ages at a faster rate and only during the period
: of acceleration following turn around.
:
: Is this idea still in vogue? Has it been published in any peer
: reviewed journal?
:
: I do not quite understand your question but there is only
: one theory of space and time that has been taught and
: used by physicists throughout the world for nearly a
: century and that is Einstein's theory of relativity.
:
: Various aspects of relativity have, of course, been
: published in peer-reviewed journals and the theory is
: completely accepted. The only dissent is in places
: like this newsgroup where any crackpot is free to post.
:
: According to relativity, the earthbound twin will be
: found to have aged more than the travelling twin when
: they meet up again. How the aging of each twin is
: measured by the other twin during the journey is
: described in many places and web sites. If you are
: interested I will try to find one for you.
:
: Try to find places where hypnotists in Einstein criminal cult say the
: greater youthfulness of the travelling twin is due to the acceleration
: he undergoes and places where other (or even the same) hypnotists say
: the greater youthfulness of the travelling twin has nothing to do with
: the acceleration. You may even find a place where a hypnotist say both
: truths simultaneously.
:
Are you sure it's hypnotism and not lobotomy?

No.

By the way, guess who is the Albert Einstein of our generation
teaching both truths simultaneously (I am still not sure whether it is
hypnotism or lobotomy):

A 2004 discussion in sci.physics.relativity:

http://groups.google.ca/group/sci.ph...c3061f6a083e6?

Pentcho Valev wrote:
The following three statements can be found in relativists' texts:

Tom Roberts: The problem with your first two statements is they are
not specified precisely enough to have a definite answer.

1. The travelling twin is younger because he undergoes acceleration.

Tom Roberts: Well, sort of. A better way of stating this is that the
traveling twin is younger because he did not follow a geodesic path
while her inertial twin did. But a necessary ingredient of his
following a non-geodesic path is that he accelerates somewhere. The
point is, the elapsed proper time of a path is an integral over the
PATH, not the acceleration. One can arrange a situation for 2 clocks
which follow trajectories that periodically meet, in which the clock
with the larger proper acceleration also has the larger elapsed proper
time betwen meetings.

2. The acceleration can be neglected and yet calculations based on
uniform motion show that the travelling twin is younger.

Tom Roberts: I'm not sure what you mean by "the acceleration can be
neglected". I'm guessing that you mean the "3-clock approach", in
which the "traveling twin" is replaced by two inertial clocks that
meet at his nominal turning point, and the time is transferred when
they meet -- one clock is his outbound trip and the second is his
return trip. This way there is no acceleration, but one time
measurement takes an out-and-back trip and the other measurement
remains at home (in an inertial frame). Yes, for that 3-clock approach
the traveling 2 clocks show a total elapsed proper time less than the
inertial clock. The point is, the elapsed proper time of a path is an
integral over the PATH, not the acceleration.

3. Special relativity cannot resolve the twin paradox - only general
relativity can.

Tom Roberts: This was thought to be true a long time ago, by Einstein
and others. It is now known to be false. SR can be used to compute any
measurement in this situation, because it occurs in Minkowski
spacetime (i.e. there is no curvature present).
________________________________
[end of the 2004 discussion]

Pentcho Valev

"Pentcho Valev" wrote in message
oups.com...
:
: Androcles wrote:
: "Pentcho Valev" wrote in message
: ups.com...
: : Martin Hogbin wrote:
: : wrote in message
: ups.com...
: : When I previously had access to the internet about ten years ago I
: : expressed interest in this topic and was informed that a space
: : traveller does not physically age at a slower rate but that his
earth-
: : bound twin physically ages at a faster rate and only during the
period
: : of acceleration following turn around.
: :
: : Is this idea still in vogue? Has it been published in any peer
: : reviewed journal?
: :
: : I do not quite understand your question but there is only
: : one theory of space and time that has been taught and
: : used by physicists throughout the world for nearly a
: : century and that is Einstein's theory of relativity.
: :
: : Various aspects of relativity have, of course, been
: : published in peer-reviewed journals and the theory is
: : completely accepted. The only dissent is in places
: : like this newsgroup where any crackpot is free to post.
: :
: : According to relativity, the earthbound twin will be
: : found to have aged more than the travelling twin when
: : they meet up again. How the aging of each twin is
: : measured by the other twin during the journey is
: : described in many places and web sites. If you are
: : interested I will try to find one for you.
: :
: : Try to find places where hypnotists in Einstein criminal cult say the
: : greater youthfulness of the travelling twin is due to the acceleration
: : he undergoes and places where other (or even the same) hypnotists say
: : the greater youthfulness of the travelling twin has nothing to do with
: : the acceleration. You may even find a place where a hypnotist say both
: : truths simultaneously.
: :
: Are you sure it's hypnotism and not lobotomy?
:
: No.
:
: Pentcho Valev

Know what you mean. I'm still uncertain whether Einstein
was an extremely cunning and clever charlatan or a raving loonie.
"Idiot savant" comes to mind.

"Androcles" wrote in message .. .

"Pentcho Valev" wrote in message
oups.com...
:
: Androcles wrote:
: :
: Are you sure it's hypnotism and not lobotomy?
:
: No.
:
: Pentcho Valev

Know what you mean. I'm still uncertain whether Einstein
was an extremely cunning and clever charlatan or a raving loonie.
"Idiot savant" comes to mind.

Looks like you have found a friend, Androcles.



--
Martin Hogbin

"Martin Hogbin" wrote in message
...
:
: "Androcles" wrote in message
.. .
:
: "Pentcho Valev" wrote in message
: oups.com...
: :
: : Androcles wrote:
: : :
: : Are you sure it's hypnotism and not lobotomy?
: :
: : No.
: :
: : Pentcho Valev
:
: Know what you mean. I'm still uncertain whether Einstein
: was an extremely cunning and clever charlatan or a raving loonie.
: "Idiot savant" comes to mind.
:
: Looks like you have found a friend, Androcles.

Looks like the straw is bent and broken, Pigbin.
http://www.androcles01.pwp.blueyonde...lgol/straw.gif


Looks like you are a moron, Pigbin, but then, looks can sometimes
be deceptive. Not so in your case, though.

All you Einstein Dingleberry cranks rely on "looks like", "seems like",
"could be", "might be" for argument and never offer a shred of
proof of what IS.