Properties of a preferred frame, an inertial frame in SR and
in [Physics]
|
From: Michael Moroney on 30 Jul 2010 13:39 kenseto <kenseto(a)erinet.com> writes: >On Jul 30, 11:14=A0am, moro...(a)world.std.spaamtrap.com (Michael Moroney) >wrote: >> >> That's so much gobbledygook nonsense. =A0Are you claiming that this >> photon is travelling along with the wavelength of sodium light but a lowe= >r >> frequency and also moving at less than c, >During the transit of sodium light the wavelength is not changed. >Therefore the lower arriving frequency means lower arriving speed of >light....what so hard about that? It conflicts with experiments, all of which light in a vacuum always travels at c, for one. It conflicts with the predictions of SR, which state the above, for two. It's gobbledygook nonsense, for three. >>then all of a sudden it decides >> to change its wavelength and start moving at c? =A0 >No....the incoming sodium light becomes a new light source (not sodium >anymore)in the grating's frame and the grating defines a new >wavelength for it. This new wavelength in combination with its >measured frequency give c. And if we test its frequency and wavelength in between, the magical conversion of speed and wavelength will happen at the point measured, correct? And if we do so again, closer to the source, same thing, right? All the way back to the source? The result is, the photons happen to be measured as moving at c with the longer wavelength the whole way! And it's still nonsense. Easily disproved as well. A---B--------------------C A is a sodium light source retreating from B and C relativistically. B and C are stationary wrt each other. A emits photons towards B and C. B measures and retransmits some of the photons, which have the sodium wavelength but are moving slower than c, and B doesn't interfere with other photons. The retransmitted photons now have the longer wavelength and are moving at C, right? So C will receive the retransmitted photons from B before receiving the original ones from A! This does not happen.
From: kenseto on 31 Jul 2010 08:41 On Jul 30, 1:39 pm, moro...(a)world.std.spaamtrap.com (Michael Moroney) wrote: > kenseto <kens...(a)erinet.com> writes: > >On Jul 30, 11:14=A0am, moro...(a)world.std.spaamtrap.com (Michael Moroney) > >wrote: > > >> That's so much gobbledygook nonsense. =A0Are you claiming that this > >> photon is travelling along with the wavelength of sodium light but a lowe= > >r > >> frequency and also moving at less than c, > >During the transit of sodium light the wavelength is not changed. > >Therefore the lower arriving frequency means lower arriving speed of > >light....what so hard about that? > > It conflicts with experiments, all of which light in a vacuum always > travels at c, for one. Sigh...the speed of light in a vacuum is a defined constant....not a measured constant. In fact the one-way speed of light never been measured and the two-way speed of light is a defined constant as 1 light-second/1 second. > > It conflicts with the predictions of SR, which state the above, for two. No it doesn't conflict with the predictions of SR. > > It's gobbledygook nonsense, for three. > > >>then all of a sudden it decides > >> to change its wavelength and start moving at c? =A0 > >No....the incoming sodium light becomes a new light source (not sodium > >anymore)in the grating's frame and the grating defines a new > >wavelength for it. This new wavelength in combination with its > >measured frequency give c. > > And if we test its frequency and wavelength in between, the magical > conversion of speed and wavelength will happen at the point measured, > correct? If the source is sodium the arriving speed of sodium light at any point is: c'=(measured frequency)(universal wavelength of sodium 589nm) Ken Seto >And if we do so again, closer to the source, same thing, right? > All the way back to the source? The result is, the photons happen to be > measured as moving at c with the longer wavelength the whole way! > > And it's still nonsense. > > Easily disproved as well. > > A---B--------------------C > > A is a sodium light source retreating from B and C relativistically. > B and C are stationary wrt each other. > > A emits photons towards B and C. B measures and retransmits some of > the photons, which have the sodium wavelength but are moving slower > than c, and B doesn't interfere with other photons. > > The retransmitted photons now have the longer wavelength and are moving > at C, right? So C will receive the retransmitted photons from B before > receiving the original ones from A! This does not happen.
From: Sam Wormley on 31 Jul 2010 10:13 On 7/31/10 7:23 AM, kenseto wrote: > Hey idiot....how does the grating know that light passing through it > is coming from distance star instead of coming from a source in its > frame? The grating doesn't have to know anything... it just diffracts whatever light passes through it according to physics laws. Diffracting gratings are used by astronomers to measure the spectra of the incoming light--an essential tool in measurements of planetary atmospheres stars, interstellar clouds, galaxies, quasars, etc. Background for Seto http://en.wikipedia.org/wiki/Diffraction_grating
From: Sam Wormley on 31 Jul 2010 10:26 On 7/31/10 7:41 AM, kenseto wrote: > Sigh...the speed of light in a vacuum is a defined constant....not a > measured constant. Wanna bet? First a measured constant, then because almost all the uncertainty in this measurement of the speed of light was due to uncertainty in the length of the meter, the speed of light was defined independent of the meter and the meter defined in terms of the speed of light. Background for Seto http://en.wikipedia.org/wiki/Speed_of_light#Measurement
From: kenseto on 31 Jul 2010 18:18
On Jul 31, 10:13 am, Sam Wormley <sworml...(a)gmail.com> wrote: > On 7/31/10 7:23 AM, kenseto wrote: > > > Hey idiot....how does the grating know that light passing through it > > is coming from distance star instead of coming from a source in its > > frame? > > The grating doesn't have to know anything... it just diffracts > whatever light passes through it according to physics laws. Right and the wavelength it defined for any light ray passing through it in combination with the measured frequency is alway c. What this mean is that the grating treats every light ray passing through it is a light ray generated from a source in its frame....just as sodium light or mercury light or h-alpha light passing through the grating and the grating defines a universal wavelength for each of them. Ken Seto > Diffracting gratings are used by astronomers to measure the > spectra of the incoming light--an essential tool in measurements > of planetary atmospheres stars, interstellar clouds, galaxies, > quasars, etc. > > Background for Seto > http://en.wikipedia.org/wiki/Diffraction_grating |