Re: What Is _MOTION_?

From: AllYou! (idaman_at_conversent.net)
Date: 11/16/04 

Date: Tue, 16 Nov 2004 12:29:09 -0500

"The Ghost In The Machine" <ewill@sirius.athghost7038suus.net> wrote in message
news:9nlp62-d6j.ln1@sirius.athghost7038suus.net...
> In sci.physics.relativity, Daniel Weston
> <daniel009@webtv.net>
> wrote
> on Mon, 15 Nov 2004 15:34:16 -0800
> <9644-41993CF8-316@storefull-3135.bay.webtv.net>:
> > We all certainly hope that when AllYou comes back next time, after
> > thinking further a bit, he will have learned to think and talk more
> > clearly. It would also be helpful if he matured a bit. A mind is a
> > terrible think to waste.
> >
>
> It makes little difference; clocks cannot measure time directly.
> Even the atomic fountain clock has a fatal flaw.
>
> Hopefully I can draw this, but if the cavity resonator is placed
> at point A, a somewhat accurate measurement is possible.
>
> But suppose it was placed at point B, instead?
>
>
> A====> * (top of Cs-133 fountain)
> * *
> B====> * *
> * *
> * *
> * *
> * *
> ^ v
> source sink
>
> I can't draw worth a darn but one gets the idea, one hopes.
> Presumably the source pressure can be adjusted to control the
> height of the fountain (depending on local g) but I know very
> little about the actual internal workings atomic clocks.
>
> All clocks measure motion of something: a pendulum, a
> vibrating quartz crystal, a VCO synchronized by a pulse of
> Cs-133 photons from atoms in a known state.
>
> Whether this flaw affects the ideal one calls "time", I don't know,
> although I doubt it; other effects can be construed by
> hypothesizing the Lorentz contraction. For instance, the
> design of accelerators must take the Lorentz contraction
> and the relativistic mass-gain into account, lest they malfunction.
>
> Time is a useful tool, much like the meter. The meter isn't
> exactly measuring length directly, either -- although for
> most practical purposes it's not all that different.
> However, for something moving faster than a snail, one cannot
> use a meter stick; one instead uses such things as light rays.
> This suggests a dichotomy: the "real rod length" versus the
> "light-measured length", which is similar to kenseto's ideas,
> with one important difference: there is no *actual dichotomy*,
> and the real rod length is exactly the same as the light-measured
> length, from the standpoint of the observer shooting the beams.
>
> Change the observer, and the length changes. Time also changes.

Thanks, but time only changes to the extent that we recognize that time is just an
abstraction layered onto the science of physics. What actually happens is that the value
of motion is reduced.

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