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Re: Sub-Hertz Gravity Wave Detection

Cross-posted to 2 groups.

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Dear Gary Harnagel \n\n Gary Harnagel wrote:

>> the real question is, if you are measuring a length with a ruler, and
>> both the length and ruler are in the same gravitational field, and a
>> gravitational wave passes, arn't both ruler and length affected ?  by
>> nearly the same amount ?
> 
> LIGO is an interferometer, similar to a Michelson interferometer.  It
> has two perpendicular arms and is sensitive to a phase shift between
> beams in each arm.  As Sam said, Wiki is your friend:
> 
> https://en.wikipedia.org/wiki/LIGO

Thank you mister Gary. However along large distances those distances are 
not very constant, the surface of Earth, the plateaus etc, being in 
motion. I suspect those distance are to be defined by high accuracy 
dessignated satellite in space, sort of GPS. The soil of Earth is not 
stable. I dont understand.

"Each observatory supports an L-shaped ultra high vacuum system, measuring 
4 kilometers (2.5 miles) on each side. Up to five interferometers can be 
set up in each vacuum system."

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Sub-Hertz Gravity Wave Detection Katarina Bulakova <katabu@transmatric.org> - 2015-10-05 22:27 +0000
  Re: Sub-Hertz Gravity Wave Detection Odd Bodkin <bodkinodd@gmail.com> - 2015-10-05 17:40 -0500
    Re: Sub-Hertz Gravity Wave Detection Katarina Bulakova <katabu@transmatric.org> - 2015-10-05 23:07 +0000
      Re: Sub-Hertz Gravity Wave Detection Helmut Wabnig <hwabnig@.- --- -.dotat> - 2015-10-06 10:33 +0200
        Re: Sub-Hertz Gravity Wave Detection kefischer <emoneyjoe@iglou.com> - 2015-10-06 04:40 -0400
          Re: Sub-Hertz Gravity Wave Detection Poutnik <Poutnik4NNTP@gmail.com> - 2015-10-06 10:50 +0200
            Re: Sub-Hertz Gravity Wave Detection R Kym Horsell <kym@kymhorsell.com> - 2015-10-06 09:55 +0000
              Re: Sub-Hertz Gravity Wave Detection "Y.Porat" <y.y.porat@gmail.com> - 2015-10-06 03:12 -0700
              Re: Sub-Hertz Gravity Wave Detection kefischer <emoneyjoe@iglou.com> - 2015-10-06 06:41 -0400
                Re: Sub-Hertz Gravity Wave Detection Lofty Goat <rlwatkins@gmail.com> - 2015-10-09 14:16 -0500
            Re: Sub-Hertz Gravity Wave Detection Katarina Bulakova <katabu@transmatric.org> - 2015-10-06 19:21 +0000
              Re: Sub-Hertz Gravity Wave Detection Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2015-10-07 19:13 -0400
      Re: Sub-Hertz Gravity Wave Detection "Y.Porat" <y.y.porat@gmail.com> - 2015-10-06 03:09 -0700
      Re: Sub-Hertz Gravity Wave Detection Odd Bodkin <bodkinodd@gmail.com> - 2015-10-06 07:46 -0500
        Re: Sub-Hertz Gravity Wave Detection Katarina Bulakova <katabu@transmatric.org> - 2015-10-06 18:59 +0000
        Re: Sub-Hertz Gravity Wave Detection noTthaTguY <abu.kuanysh05@gmail.com> - 2015-10-06 12:06 -0700
    Re: Sub-Hertz Gravity Wave Detection "Y.Porat" <y.y.porat@gmail.com> - 2015-10-06 03:06 -0700
  Re: Sub-Hertz Gravity Wave Detection Sam Wormley <swormley1@gmail.com> - 2015-10-06 09:18 -0500
    Re: Sub-Hertz Gravity Wave Detection gilber34 <fafa@invalid.com> - 2015-10-06 09:23 -0500
      Re: Sub-Hertz Gravity Wave Detection Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2015-10-06 12:09 -0400
        Re: Sub-Hertz Gravity Wave Detection "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-10-06 09:45 -0700
      Re: Sub-Hertz Gravity Wave Detection Katarina Bulakova <katabu@transmatric.org> - 2015-10-06 19:06 +0000
      Re: Sub-Hertz Gravity Wave Detection Tom Roberts <tjroberts137@sbcglobal.net> - 2015-10-07 16:22 -0500
  Re: Sub-Hertz Gravity Wave Detection Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2015-10-06 11:59 -0400
  Re: Sub-Hertz Gravity Wave Detection Tom Roberts <tjroberts137@sbcglobal.net> - 2015-10-07 16:16 -0500
    Re: Sub-Hertz Gravity Wave Detection Natalina Nazvarova <natana42@hotmail.com> - 2015-10-08 17:38 +0000
  Re: Sub-Hertz Gravity Wave Detection "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-10-07 16:32 -0700
  Re: Sub-Hertz Gravity Wave Detection "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-10-07 16:37 -0700

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