Re: The differences between LET, SRT and IRT

On Apr 11, 11:21 pm, Jerry <Cephalobus_alie...@xxxxxxxxxxx> wrote:
On Apr 11, 6:44 am, "Dirk Van de moortel" <dirkvandemoor...@ThankS-NO-

SperM.hotmail.com> wrote:
kenseto <kens...@xxxxxxxxxx> wrote in message

  c25b72c1-2b6a-47f3-a371-8cce50495...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx

Never mind the words.
We need /action/.
Try to *measure* the differences with the aid of the following
equipment:
1. Cecium clocks and frequency counters.
2. Laser beam sources.
3. Photosensitive detecting surface (40 cm in diameter).
4. Beam splitters.
5. Cover plates.

Those are what Ken originally specified. But I think we've
elsewhere pretty much established that a much more definitive,
and probably cheaper, method of performing the experiment would
use:

MATERIALS:

1. Continuous laser. Lasers of the requisite characteristics
   are easily located on eBay.
2. High speed arbitrary waveform generator (AWG). Commercial
   off-the-shelf AWGs of the requisite qualities are sold by
   companies such as Textronics:
   http://www.tek.com/site/ps/0,,76-19779-INTRO_EN,00.html
3. Kerr cell shutter and driver electronics. Most commercial high
   speed Kerr cell shutters are designed as camera shutters, and
   lack features required for continuous modulation such as
   liquid cooling systems to maintain the temperature of the
   modulator. If you keep the experimental runs relatively short,
   this may not be a problem.
4. Some as yet unspecified means of determining the position of
   the spot of light. It could be as simple as a *** film
   holder, or as sophisticated as a CCD camera.

METHOD:

Put the high speed Kerr cell shutter in the path of the continuous
laser. Aim the laser so that it hits the center of the detector
surface:

          -------
        /         \
       /           \
      |             |
      |      X      |
      |             |
       \           /
        \         /
          -------

Now modulate the Kerr cell so that it interrupts the continuous
laser beam every 10^-8 sec. for 1x10^-10 sec. In other words, the
beam looks something like this

______   ____________________   ____________________   _____
      |_|                    |_|                    |_|

       |<------10^-8 sec----->|        10^-10 sec-->| |<--

The beam is now "on" 99% of the time, "off" 1% of the time.

What is the purpose of the interruptions?


Ken's theory predicts that the beam will be displaced in a
direction opposite the direction of absolute motion:

          -------
        /         \
       /           \
      |             |
      |             |
      |      X      |
       \           /
        \         /
          -------

My theory does not predict what you said. Without the clocks how do
you detect if the spot has moved?

Ken Seto

.

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