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Re: The Detection Of Gravitational Waves.

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jamesl51165@gmail.com wrote:

> بتاريخ الخميس، 18 فبراير، 2016 12:00:39 م UTC-8، كتب The Starmaker:
>> How many of yous believe
>> that there was actually
>> A Detection Of Gravitational Waves?
> 
> How did we detect a change smaller than an atomic nucleus?

Observing an interference pattern of two light waves that produce no 
interference pattern when there is no (extra) strain.  Since none of the 
several videos¹ explaining this can be displayed here, and for recreation,
new ASCII art by me (simplified, exaggerated, not to scale):

                  No strain                          Strain
                                               (as with GW150914)

                                                __ .========.
                                                 .|:    .   :  ^
              __ .========.                     .  :  .'    :  :
              .'|:  '.    :                    :   :  '.    :  :
            .'   :    '.  :                   '    :    '.  :  :
        Mirror   :    .'  :               Mirror   :    .'  :  :
      ,'    .    :  .'    :              .    .    :  .'    :  :
    ,'       '.  :  '.    :            ,'      '.  :  '.    :  :
  |_           _|:    '.  :     D    |_          _|:    '.  :  v  D
 ,.--------------:    .'  '---. e    ,.------------:    .'  '---. e
 ::               '..'        : t    ::             '..'  .-.   : t
 ::  .''.    .''.   '.        : e    ::.    .''.    .''..'   '. : e
 ::.'    '..'    '..' '.      : c    :: '..'    '..'    '.     ': c
 ::                   .''.    : t    ::                 .''.    : t
 `'--------------.  .'    :---' o    `'------------.  .'    :---' o   
                 :  '.    :     r      ----> <---- :  '.    :     r   __
                 :    '.  :                        :    '.  :        |PE

_________
¹  e.g., <https://youtu.be/s06_jRK939I?t=112>

> That is an impossible claim.

It is not.  In fact, the maximum measured strain was even smaller than the 
diameter of a proton (< 1.68 × 10⁻¹⁵ m).

<http://www.ligo.org/science/Publication-GW150914/index.php>

> What nucleus did we use to detect that?

None.


PointedEars
-- 
I heard that entropy isn't what it used to be.

(from: WolframAlpha)

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The Detection Of Gravitational Waves. The Starmaker <starmaker@ix.netcom.com> - 2016-02-18 12:00 -0800
  Re: The Detection Of Gravitational Waves. Sam Wormley <swormley1@gmail.com> - 2016-02-18 14:04 -0600
  Re: The Detection Of Gravitational Waves. jamesl51165@gmail.com - 2016-02-18 16:56 -0800
    Re: The Detection Of Gravitational Waves. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-02-20 11:03 +0100

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