Re: Idiot Proof Aether Drift Experiment (OWLS)

From: Ballisticus (B_at_..(Ballisticus))
Date: 06/26/04 

Date: Sat, 26 Jun 2004 21:48:10 GMT

On 25 Jun 2004 06:32:23 -0700, funk420@yahoo.com (luke) wrote:

>Tom Roberts <tjroberts@lucent.com> wrote in message news:<toLCc.28204$eH1.13305568@newssvr28.news.prodigy.com>...
>> luke wrote:
>> > Tom Roberts <tjroberts@lucent.com> wrote in message
>> > news:<76LBc.6988$Pt.5646@newssvr19.news.prodigy.com>...
>> >> [...]
>>
>> > 1) D = (two way travel time) * c / 2.
>> >
>> > 2) synchronize the clocks by assuming the travel from A to B occurs at
>> > speed c. [...]
>> >
>> > 3) measure travel time T from B to A using those synchronizations.
>>
>> Just imagine the synch signal in (2) is reflected back to A and is used
>> for (3). Assume A was set to 0 at the time of emission, so A must read
>> 2D/c when the signal returns (because (1) determined D so that is true).
>> And you set B so A->B was the speed c, so at the instant of reflection B
>> was set to D/c. So the measured flight time for the B->A signal of (3)
>> is D/c -- OWLS is isotropic.
>
>You're right again! This is really weird, or at least very
>interesting. How come I didn't learn this from my many physics
>courses and relativity books?
>
>My error was in the term "measured flight time".. we aren't actually
>measuring the flight time (!) because the clocks are not synchronized
>properly (OWLS != c).. To be very specific all we can do is subtract
>the clock reading at B when signal leaves there from the clock reading
>at A when signal arrives there, and as you point out the resulting
>number does not tell us the bulk flow of the medium!
>
>If only we could know the reading on clock B as the signal arrives
>back at A..
>
>>
>> Note that in (2) you could assume that OWLS is k*c for some constant k,
>> 0<k<1. Then in (3) you'll conclude OWLS is not isotropic, determined by
>> the factor k you used in (2). This is a general property -- OWLS depends
>> explicitly on how you synchronize your clocks, and that is an arbitrary
>> choice for you to make. But there is no such arbitrary choice in TWLS.
>>
>>
>
>Also, instead of choosing a multiplicative constant, we can use an
>offset when doing the synchronization. It still won't help.
>
>OK, you win for now, we cannot detect OWLS with just light in a vacuum
>and a couple clocks. Thanks AGAIN!

We can easily measure OWLS using two accurate and stable clocks that are
synched whilst together and subsequently moved apart, to say 3000 metres.

The synchronization cannot be checked while they are apart (except with my
'moving rod' method, which is impractical).

Signals can be sent from A to B and from B to A if you like to check for
'aether flow'.

The answer will be c, in both directions snce light moves at c relative to its
source and in this case, source and observer are in the same frame.

A meaningful measurement of OWLS requires that the source be MOVING wrt the
observer. That is much more difficult.... but can probably just be done with
the latest technology.

>
>But maybe we can still measure OWLS (i.e. bulk flow of medium U)..
>can we perhaps use:
>
>1) measure CHANGE in U over time on rotating earth..
> [e.g. something like Krisher et al.]
>
>2) a material with refractive index between our clocks ?
> [e.g. physics/0205070]
>
>3) moving clocks (time dilation w.r.t. bulk flow) ?
> [e.g. gr-qc/0304063]
>
>Cheers - luke

See why relativity is wrong:
www.users.bigpond.com/hewn/index.htm

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