Re: Has the speed of light emitted by a fast moving particle been measured ?
Re: Has the speed of light emitted by a fast moving
particle been measured ?
Source: http://sci.tech−archive.net/Archive/sci.physics/2005−09/msg02370.html
• From: Timo Nieminen
• Date: Sat, 1 Oct 2005 05:50:55 +1000
On Fri, 30 Sep 2005, Androcles wrote:
"Timo Nieminen" wrote:
| On Fri, 30 Sep 2005, blackboab wrote:
|
| > if a particle going close to the speed of light − eg in a particle
| > accelerator − emits a photon can its speed be measured ?
| >
| > if so how ?
|
| Sure, it can be measured. How? Time how long it takes to go from point
A
| to point B.
Guess what, Nieminen?
A and B are comoving. In empty space, to boot. (Unless the Earth stopped
orbiting the sun, that is).
Does that stop you from measuring, for example, your average speed when
you travel from home to shopping? Hasn't it been know since Galilei that
it doesn't matter if "A and B are comoving"? Are you starting to grow
into an anti−Galileo crackpot as well as an anti−Einstein crackpot?
Adding the speed of light to it's source has even more practical uses.
Navigation, for example.
http://www.photonics.com/spectra/research/XQ/ASP/preaid.227/QX/read.htm
Rings on a Chip Portend Tiny Laser Gyroscopes
"Researchers in New Mexico have designed and fabricated a pair of
semiconductor ring lasers on a single chip and have observed a beat note
when the outputs of the two lasers are combined. "
Ah yes, the Sagnac effect; one of the most conclusive disproofs of
emission theories of light, and completely in accord with the special
theory of relativity. You will, of course, recall that Sagnac published
his results as a proof of ether theories of light, not as a proof of
emission theories of light.
Re: Has the speed of light emitted by a fast moving particle been measured ? 1
Re: Has the speed of light emitted by a fast moving particle been measured ?
The spectrum and angular distribution of
| such sources is measured, and the applications often involve a
wavelength
| measurement (diffraction by crystals). Frequency and wavelength tell
you
| the speed. AFAIK,
But you don't know, you are a [cut Androcles' potty−mouth
spewing] teacher, not an engineer or physicist.
Ding! Actually, I'm a physicist. You really didn't know that a lot of
physicists teach as well as do research? Oh my! And after you even read
and quoted from and commented specifically on my occupation from my
(admittedly, at the time, it hadn't been updated for about 2 years)
webpage.
And since I'm already cutting your potty−mouth language, I might as well
comment now that if you can't display the cilivity of at least a 3 year
old, I'll put my effort into discussing physics with 3 year olds, and not
you. You keep replying to my postings, so it appears you want to
converse. If so, then do so in an appropriate manner.
At least you have the decency to post anonymously, to save your family
from the embarrassment of being relating to such a fount of bad language.
And since you raised the point, are you claiming that:
| the spectrum is measured in terms of energy, since it's
| rather difficult to directly measure frequencies in the X−ray range.
isn't the case?
| If the speed of light depends on the speed of the source, then the
Maxwell
| equations are broken.
How about that!
"It is known that Maxwell's electrodynamics−−as usually understood at
the present time−−when applied to moving bodies, leads to asymmetries
which do not appear to be inherent in the phenomena. Take, for example,
the reciprocal electrodynamic action of a magnet and a conductor. The
observable phenomenon here depends only on the relative motion of the
conductor and the magnet, whereas the customary view draws a sharp
distinction between the two cases in which either the one or the other
of these bodies is in motion."
Re: Has the speed of light emitted by a fast moving particle been measured ? 2
Re: Has the speed of light emitted by a fast moving particle been measured ?
http://www.fourmilab.ch/etexts/einstein/specrel/www/
And this relates to whether or not the Maxwell equations are broken in
what way?
If all you can post is irrelevancies and bad language, what possible
interest can there be in reading your babbling?
[cut potty−mouth spewings]
I
| think this is an interesting topic, but alas! − although there are 3
| frequent posters to sci.physics who rather loudly support such
theories,
| none of them seem to be willing to discuss such things :(
You ran away from me,
[cut potty−mouth spewings]
No, you ran from the discussion by (1) not discussing any physics anyway,
and (2) being unable to take part in a civil discussion.
If you're really interested in a genuine experimental test of your pet
theory, why not discuss it?
If you're not interested in your theory, or physics, then go ahead, just
fart out another blast of infantile invective.
−−
Timo
.
Re: Has the speed of light emitted by a fast moving particle been measured ? 3