Read and learn: Velocity of light relative to the source is constant because of constant mass of electrons which are part of the source oscillating structure. Thus relative to source light propagates in constant speed regardless of its wavelength. To produce light which propagates with different speed one must design charge oscillator with unconventional structure. The same applies to EM waves.
Mathew Orman
Public release record on November 23 2011.
How does this explain why the measured speed of the light is constant regardless of an observer's relative speed to the source?
You've learned very little.
Bob
You need to provide an experimental results from an experiment conducted on the Earth using a method which is not designed to obscure the results such as continuous Doppler effect which can not be interpreted unambiguously.
Mathew Orman
The key word is "Relative"
Jamie
There are lots of ways to make photons that don't involve electrons. But the photons all travel at the same speed. This turns out the be the same speed that particles approach if you accelerate them really hard. And (very probably) the same speed as neutrinos. Same speed as gravity.
You really don't like c, do you? You keep struggling against it.
John
Why? C is just a speed number not a limit. Wait till Monday and see it for your self on my website.
Mathew Orman
http://
C is a fundamental property of this universe. It's sort of a side effect that nothing can go faster.
John
140 years ago famous physicist had show that information or energy can be transferred instantaneously. How much faster than light is That? His experiments and mathematical model is included in the current politically correct science. But you will never guess his name just like Einstein had missed his work.
Mathew Orman
Notice the ? photons produced in the core of the sun when protons combine with deuterium nuclei. The speed of the resulting photon is c and is quickly absorbed by a charged particle
From the quantum mechanical perspective, all photons travel at c.
Photon momentum p = h?/c = h/?
Photon Energy E = h?
That result was shown to be false.
A supernova explosion emits all sorts of photons, from IR to gammas, plus neutrinos, and they all arrive here in a very small time window, after traveling for zillions of years.
John
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Try every time radar is used.
Mark L. Fergerson
Be very careful how you phrase that John. It isn't that *nothing* can go faster it is that you cannot transfer *information* faster than c. No physical object with mass and no information can be transferred faster than the speed of light according to our present understanding of physics. This might have to be tweaked perhaps to say you can signal at very slightly ftl with high energy neutrinos if you can ever find a way to make enough of them and detect them reliably.
In extremely dispersive media at exactly the right frequency you can get situations where a naive measurement of "velocity" appears to show ftl behaviour. All the reports of apparent FTL signal propagation fall into this big pothole. And it is virtually certain that the OP has fallen into this trap too. Actually very hard to tell since his rants here are basically incoherent gibberish.
A reasonably accessible discussion of phase, group and signal velocity is online at:
(other more rigorous descriptions are online elsewhere)
Someone has done a cute simulator where you can see anomolous dispersion and play with the parameters online.
The problem is that the instant you try to modulate it with a signal down a very dispersive channel it is scrambled by the very nature of the medium. Examples include waveguides and the edge of very strong atomic absorption lines like sodium D - a fun demo.
Regards, Martin Brown
Wrong, try again..
Mathew Orman
That remains in doubt.
Things like ftl phase velocities are essentially optical illusions. Simple electrical measurement errors are, too.
John
age
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Except spam.
James
Oh I agree. But wouldn't it be fun if it were true!
They are real and when you are doing ultra precision measurements have to be corrected for. The speed of light with error bars as a function of time is a salutary lesson in how an error made by a respected expert can remain undetected for quite a while. If memory serves it was a microwave based standing wave method in a vacuum waveguide and one tiny correction for imperfect vacuum was applied in the wrong sense. It didn't show up until a new improved technique gave even more precise answers that were in very close agreement with a previous technique. Subsequent analysis showed in the interim all the other experimenters had replicated the original experimenters error in their analysis.
(Actually I would love to find the original textbook this graph was in - I think an undergraduate relativity? text of about the 1970's)
The world is getting even more complicated with crazy metamaterials that work in the optical now looking like a realistic possibility.
Confusion between phase, group and signal velocities account for all the faster than light claims ever made. That or stupidity.
Regards, Martin Brown
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