Re: EXPERIMENTS THAT REFUTE RELATIVITY

In sci.physics.relativity, Jeckyl
<noone@xxxxxxxxxxx>
wrote
on Mon, 31 Dec 2007 13:48:47 +1100
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"The Ghost In The Machine" <ewill@xxxxxxxxxxxxxxxxxxxxxxx> wrote in message
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In sci.physics.relativity, Jeckyl
<noone@xxxxxxxxxxx>
wrote
on Mon, 31 Dec 2007 10:10:12 +1100
<13ng9b33e0d813c@xxxxxxxxxxxxxxxxxx>:
"Dr. Henri Wilson" <HW@....> wrote in message
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DON'T YOU KNOW THAT THE NONROTATING OBSERVER IS MOVING WRT THE
SOURCE/DETECTOR?

There is no non-rotating observer in Sagnac .. dummy


Well...actually, there are two observers in Sagnac, the
one rotating with the disc

Yes .. the detector that observes the sagnac effect

and one observing the disc rotate,

No need for that one .. you could also say there is one watching the kettle
boil in the kitchen next to the lab, but that doesnt mean it is part of the
epxeriment or relevant to it.

An interesting subpoint. Nevertheless, if one introduces such an
extraneous observer, it behooves the theory to ensure that his
observations are consistent with the needed one. I believe SR does such
though would have to look through the mathematical explanation again.

But you're correct; the second observer isn't strictly necessary.


One Sagnac experiment that was well known was the one to measure the
rotation of the earth .. So unless you are claiming that there was an
observer floting above the earth non-rotating observing the light in the
sagnac experiment, I don't think that counts

Of the observers relevant to the experiment .. there is one .. the one
moving with the rotating aparatus.


And seeing the effect. This doesn't disprove SR, though one has to be
careful with the coordinates as the rotating frame isn't inertial.

I'd prefer a nice treatment using tensors (which gets into the GR
realm), but would have to poke around, and I'm a baby when it comes
to tensors, really, especially when it comes to rank and such.

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Relevant Pages

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  • Re: EXPERIMENTS THAT REFUTE RELATIVITY
    ... There is no non-rotating observer in Sagnac .. ... One Sagnac experiment that was well known was the one to measure the ...
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  • Re: EXPERIMENTS THAT REFUTE RELATIVITY
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