>"Tom Roberts" wrote in message
>news:Je2dnam4Rq_wLmHF...@giganews.com...
On 4/23/17 4/23/17 2:24 AM, Kevin Aylward wrote:
> "Tom Roberts" wrote in message
> news:zKKdnd70Bsl-g2HF...@giganews.com...
>> As I keep saying and Lake keeps ignoring, it is the
>> MEASUREMENTS OF SIGNALS that are affected by relative motion and by
>> gravity.
>>> No, it has been demonstrated MANY times that velocity and gravity slow
>>> down
>>> time.
>> You got your facts WRONG. This has NEVER BEEN OBSERVED. What actually has
>> been
>> observed MANY times is that relative motion and gravity can and do affect
>> THE
>> WAY SIGNALS ARE MEASURED.
>
> Again, this is very misleading language Tom. It implies that effects due
> to
> gravity and motion are not physical, but merely "a measurement effect".
> i.e.
> effectively, measurement errors.
>Hmmmm. I make no such implication, and your inference that I did is WRONG.
Not at all. An implication, is what it says. It is something that may
suggest something. Clearly, the words may be taken to mean what I suggest.
Whether or not they do to a specific person, is a matter of fact for that
person.
So, I infer from this, that you infer that my stating that there was an
inference, that there was an inference that I considered such inference as
true personally, is incorrect.
>These are indeed not "physical" (in the usual sense of "changing" the
>clock), they are GEOMETRICAL. Anyone who thinks I mean they are "merely a
>measurement effect" has not been reading what I write around here.
I thing you are a tad too stuck in your own interpretation as to what
"physical" means.
>Note I was responding to Lake's mistakes, and was not writing a general
>text on SR/GR. That _IS_ how newsgroups like this work.
> As previously noted, many times, taking initially synchronised clocks on a
> round
> trip results in a loss of synchronisation. This is direct proof that there
> is a
> real, physical effect associated with time, due to gravity and motion, and
> not
> just a measuring effect.
>No.
What exact part of:
"there is a real, physical effect associated with time, due to gravity and
motion"
did you have problems with?
>YOU also got your facts wrong, and make an invalid inference (just like
>Lake does). Yes, this proves it is not a "measuring effect", but then again
>I never said or implied that it is. But this does NOT "prove it is
>physical", because a GEOMETRICAL effect can also explain this. And indeed,
>in modern physics this is explained as a GEOMETRICAL effect.
You are just getting tonged tied in semantics.
I consider going to New York from Los Angels via Denver or via Dallas a true
physical fact. Any one that drives those routes can tell by the amount of
fuel the use. This is as physical as you can get. Indeed, if someone where
to run both routes, I am quite sure they would declare that there are aware
of the physical differences.
So, it is argued the same for time.
So, depending on say, the gravitational field, clocks will experience
different paths in space-time, hence, experience different real times, hence
experience different amounts of time, hence time itself, depends on gravity.
Or, just as one inserts more distance into a travel trip, one inserts more
time.
So, why not just say, gravity effects the passage of time, instead of "no,
no, no, clocks don't tick fast or slow and whatever....its.... a change in
path length in space-time....etc..."
>> Even if the experiment had never been done, SR/GR
>> predicts that such a physical result would indeed occur.
>NOPE! SR and GR predict that such a GEOMETRICAL effect does occur. And that
>prediction has been verified many times.
First you say "Nope", then you say "Yes" in the same sentence. What is it?
Is there a final physical result, or not?
You are way on the way to 1984 with this newspeak. Goldstein would be
proud.
Do you actual understand what "physical result" actually means? does it say
why?
My statement is 100% accurate. It can not imply anything but what I said, to
wit: " SR/GR predicts a physical result". Period. Whether or not, as I
stated, any experiment had been done, won't effect what is predicted. You
agreed with this, despite your denial, but inserted the "geometric" for some
extraneous reason not quite fathomable to me. My statement don't care squat
how the change occurred.
You should pay more attention to exactly what I wrote, not what you, assume
I wrote. Now...
I disagree That SR and GR are "geometric" theories. This is just a
historical assumption that isn't a requirement of the mathematics. They are
simply mathematical theories that describe relations between mathematical
variables, and these mathematical variables may be associated with physical
concepts. People are then free to interpret what these variables mean to
suit they particular fancy. This is much the same as in QM. The mathematics
stands quite on its one, irrespective of whether one subscribes to the many
worlds fantasy, the Copenhagen meanderings, the ensemble interpretation or
Bohemian Mechanics.
The proof that GR can not be proven to be a "geometric" theory, is the
existence of a particle exchange theory, that gives the EFEs. To wit: it is
only a claim that GR is a geometric theory.
I don't agree that SR was derived as a "geometric" theory. Einstein just
said, light does this, and laws does this, so this is the mathematical
result. The geometric waffle came later, imo. For GR, it may well be that
there was a "geometric" impetuous, but this is irrelevant. All that matters
is that there are equations, that predict results. All interpretations, at
that level are er...ahmmm.. superfluous.
Time is ageing, aging is things that change. This is truly obvious. Go and
look at your wife's/girlfriends/ lines around their eyes. If nothing
changed, nothing would age, and time would be stopped. That IS what time is.
Aging, is objects moving. Aging requires a physical basis, i.e. time
requires a physical basis. Its not just "geometry". There is no escape from
this. The physical motion of objects is what creates time.
I would say the question Ed really wants answered, isn't whether clocks
cover more time or clocks tick slower, but how does gravity physically
effect the passage of time. That is, how does gravity, make things age,
differently, i.e. makes things change differently. How does gravity,
physically, effect the motion of objects that create the process that create
time.