Re: SRians, How Can You Claim SR is not LET in Disguise?
- From: The Ghost In The Machine <ewill@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 30 Jan 2007 20:34:39 -0800
In sci.physics.relativity, HW@....(Henri Wilson)
<HW@>
wrote
on Tue, 30 Jan 2007 22:45:04 GMT
<1rhvr2tq4equjvj0iqgn62udtkh9amegsh@xxxxxxx>:
Run my demo: http://www.users.bigpond.com/hewn/gr-aether.exe
It's quite safe.
Oh, it's safe all right; perfectly safe -- since my system
doesn't have MSVBVM60.DLL that the executable requires in
order to run it. :-P
Fortunately, this is easily fixed -- and it turns out I now
can run it using WinE. (Version 0.9.30, for those who
have Linux or FreeBSD running on an x86.)
The screen shows a bunch of yellow dots emitting blue dots
upward, and red dots rightward. All dots move at the same
speed relative to the screen.
It illustrates, plainly and simply, the second postulate of SR and (warning) it
may come as a shock when you realise what it implies.
There are a fair number of issues here.
In the demo, the light pulses all move at the same speed wrt the screen.
Well of course they do.
Please explain what causes them to move at the same speed.
Please provide a physical interpretation of what the computer screen might
represent and why the pulses move across it at the particular speed they do ..
Because you programmed it that way, of course. The real
issues are more complex. In a more accurate simulation,
a planet -- I'm assuming that that's what those silly
yellow dots are -- that fires off a red pulse rightward
while moving leftward will have a red pulse (as seen
by the screen) that is a deeper red (longer wavelength)
than a rightward moving dot; similarly for the blue pulses.
In other words, SR not only postulates that all light
moves at the same speed, but also shoehorns time and
space in order to do so; the wavelength and frequency
of a fired pulse are both adjusted. If a yellow dot is
moving at a velocity v relative to a meaurement device
(in your simulation, that's the screen proper) when it
emits a photon of frequency f0 and wavelength l0, then
the measurement device will measure
f/f0 = sqrt(1-v/c)/sqrt(1+v/c)
l/l0 = sqrt(1+v/c)/sqrt(1-v/c)
Whether this proves *anything* with respect to SR being
an "aether theory" is far from clear; all this does is
illustrate the math involved.
Got it? Good. :-)
--
#191, ewill3@xxxxxxxxxxxxx
"Woman? What woman?"
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