Re: A way to measure OWLS...and verify the constancy of the one way speed of light

bz wrote:
Tom Roberts <tjroberts@xxxxxxxxxx> wrote in
news:dc5oh5$je2@xxxxxxxxxxxxxxxxxxxxxxxx:
Not true. You make the same mistake that the C.J.Luke keeps making -- you forget that in moving the cable end to the west you change the amount of east->west vs west->east traveling the signal makes within the
cable.

We are comparing the speed of light in two very different media. It is unlikely that something will effect BOTH speeds by the same amount.

Your "unlikely" is not good enough. Not nearly. In fact, for the class of theories I discuss, this is GUARANTEED to happen. But it's not really "affecting both speeds by the same amount", it is actually a cancellation of any anisotropy in the vacuum/air path by the necessary changes in the fiber path.


There is no possible variation of this technique that can avoid this problem. For the simple reason that this is INHERENTLY a round-trip measurement, and no round-trip measurement can establish anything about OWLS.

You perform the test with your cable moved outward in many different directions. 

That does not help in determining any anisotropy of OWLS within the cable.


If you find that the delta delay is only dependent on distance between photo diode and the end of the cable, then it doesn't matter that part of your apparatus is has the signal traveling two ways, the ONLY part where the testing of light [in a vacuum] is taking place is between the end of the fiber and the photo diode. Everything else remains 'constant' and drops out of any calculations.

Yes, if the result is isotropy, then your other assumptions cancel away. But that is not what you set out to measure -- it is still the case that OWLS could be anisotropic, but because of cancellations within the fiber the result APPEARS to be isotropic. And in fact, for the class of theories I mentioned, this is GUARANTEED to happen. <shrug>


Tom Roberts	tjroberts@xxxxxxxxxx
.

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