Re: SRians, How Can You Claim SR is not LET in Disguise?
- From: The Ghost In The Machine <ewill@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 31 Jan 2007 19:48:39 -0800
In sci.physics.relativity, HW@....(Henri Wilson)
<HW@>
wrote
on Wed, 31 Jan 2007 21:35:08 GMT
<5r22s25jipgkmg73uu4rl0j2ksqcnasa8t@xxxxxxx>:
On Tue, 30 Jan 2007 20:34:39 -0800, The Ghost In The Machine
<ewill@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
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. :-)
I got it Ghost.
You are diverging again.
The subject is LIGHT SPEED, not doppler shift.
Light speed is the product of wavelength and frequency, for obvious
reasons.
l/l0 = sqrt(1+v/c)/sqrt(1-v/c)
f/f0 = sqrt(1-v/c)/sqrt(1+v/c)
s/s0 = (l/l0) * (f/f0) = 1
Simple. :-)
It turns out your simulation has a further difficulty.
Photons are well-nigh invisible until they hit something;
assuming that you have a suitable series of mirrors that
are properly angled so that the photon will hit them into
the far-observer (which is basically what the program is
modeling), I believe the mirror will impart momentum depending
on its reference frame, thus effectively making any real
commentary regarding their wavelength a bit iffy.
In any event, I am curious as to the refractive index of your H-Aether.
This refractive index -- which is usually written 'n' -- is related to
nominal lightspeed in the following way:
n = c/v
and is usually dependent on wavelength, which should lead, if n is great
enough, to some interesting prismatic effects.
--
#191, ewill3@xxxxxxxxxxxxx
Windows. Because it's not a question of if.
It's a question of when.
--
Posted via a free Usenet account from http://www.teranews.com
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