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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
Dear Aleksandr Timofeev:
"Aleksandr Timofeev" wrote in message om... \(formerly\)" dlzc1.cox@net wrote in message news:rbWZa.9683$2g.438@fed1read05... .... " What, then, is a photon's wave-function? I'm taking it to be a solution of Maxwell's equations, either described using the vector potential in some fixed gauge, or perhaps even better for the present purposes, using the electric and magnetic fields. " sci.physics.research John Baez http://groups.google.com/groups?selm...pravda.ucr.edu ================================================== =============== From: john baez ) Subject: photon wave-functions? Newsgroups: sci.physics.research Date: 1999/01/27 In article , (Greg Weeks) wrote: In the discussion single-photon wavetrains, it seems to be generally assumed that the photon has a wave-function. Even in free field theory, I don't believe this is true. Education is a process of telling a carefully chosen sequence of lies in which the amount of deliberate deception gradually tends towards zero. There is a limit to how much truth someone can absorb all at once without their brain turning to jelly! .... First and foremost, it seems to me, you have to disabuse of them of the assumption that the wavefunction of a particle has some fixed "wavetrain with finitely many wiggles" shape that depends solely on the energy of the particle. When one starts out learning physics, one tends to think of a particle as a little tennis ball or something, perhaps with some wiggly waves thrown in for good measure. The idea that it's just a "field mode" doesn't come easily! Usually one absorbs this slowly and painfully by solving Schrodinger's equation with all sorts of different boundary conditions and potentials, learning all sorts of different orthonormal bases for the space of states, and eventually realizing that the choice of basis is just a matter of convenience. The idea that a particle is just a solution of a partial differential equation and that there are *lots* of solutions having the same expectation value of energy, or even the same eigenvalue - that doesn't come easily! So, somehow you have to broach these issues. Thus I'm reluctant to talk about the issues you're raising now. They're too fancy for this conversation. I'll just whisper to you the approach I'm implicitly taking towards this question: What, then, is a photon's wave-function? I'm taking it to be a solution of Maxwell's equations, either described using the vector potential in some fixed gauge, or perhaps even better for the present purposes, using the electric and magnetic fields. I bet people who do quantum optics do something like this when they talk about the wavefunction of a photon, and I don't think it's so bad, despite the objections you note. ================================================== =============== I don't think I am the one peddling religion, Aleksandr. Bullsh*t seems to be produced on all continents. Comments. I agree with John that your answer needs to be tailored to the audience. I understand what he says about solutions to PDEs and the characterisitcs of any given particle. What he has not said is that such solution involves infinite division mathematics, something that breaks down quite easily in the vicinity of a single particle. So what he has proposed works well for a host of particles in similar situations, but applies only vaguely to any single particle of the host. The piper must be paid. Now as John's comment about the photon's wavefunction, this does in fact make it a particle in every sense of the word. Just like electrons, protons, neutrons, and the like. What is done is done for expedience. What was sadi was said to the audience (with the caveat he provided). Now you and Sergey have to describe the photoelectric effect using a wave model. Either use resonance, or come up with some other mechanism. But it needs to describe what is observed by experiment. We are talking about generating particle behaviour from waves. Such that one "field mode" excites only one other charged "field mode", leaving other resonant charged "field modes" undisturbed. You could really use your own words too, instead of quoting distantly related stuff from others, without really reading it first. Comments? David A. Smith [note to John Baez] don't know if you are seeing this or not. If I have misunderstood you, please correct me. Your shoes have trod this ground more than mine... |
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
Now you and Sergey have to describe the photoelectric effect using a wave model. Either use resonance, or come up with some other mechanism. But it needs to describe what is observed by experiment. We are talking about generating particle behaviour from waves. Such that one "field mode" excites only one other charged "field mode", leaving other resonant charged "field modes" undisturbed. You could really use your own words too, instead of quoting distantly related stuff from others, without really reading it first. Comments? David A. Smith [note to John Baez] don't know if you are seeing this or not. If I have misunderstood you, please correct me. Your shoes have trod this ground more than mine... Hi I have already given a mathematiucal description of how waves can produce the photoelectric effect but I am puzzled why you dont believe resonace cant. Isnt resonance always described as a wave function or as a overlapping of waves ? Sean |
#13
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
Now you and Sergey have to describe the photoelectric effect using a wave model. Either use resonance, or come up with some other mechanism. But it needs to describe what is observed by experiment. We are talking about generating particle behaviour from waves. Such that one "field mode" excites only one other charged "field mode", leaving other resonant charged "field modes" undisturbed. You could really use your own words too, instead of quoting distantly related stuff from others, without really reading it first. Comments? David A. Smith [note to John Baez] don't know if you are seeing this or not. If I have misunderstood you, please correct me. Your shoes have trod this ground more than mine... Hi I have already given a mathematiucal description of how waves can produce the photoelectric effect but I am puzzled why you dont believe resonace cant. Isnt resonance always described as a wave function or as a overlapping of waves ? Sean |
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
\(formerly\)" dlzc1.cox@net wrote in message news:rSz0b.5442$Qy4.4087@fed1read05...
Dear Sergey Karavashkin: "Sergey Karavashkin" wrote in message om... \(formerly\)" dlzc1.cox@net wrote in message news:rbWZa.9683$2g.438@fed1read05... ... [snip] I am not a "you". I know that the wave model of light is incorrect. I have asked you to tell me how I am wrong, and yet you come back with resonance to describe the photoelectric effect. So you come back with a broken explanation. Knowing it is broken. And claim it is because science does not want to (or cannot) fix it. Dear David please point even alone experiment of "interaction" really of free electron with "photon". I am absolutely sure, that you can not make it for a real _free_ electron. I do not like tricks with feeblly bound electrons. You think, what was done before you is quite enough. Besides, you colleagues want to see or hear nothing. [snip] |
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
(Sergey Karavashkin) wrote in message . com...
\(formerly\)" dlzc1.cox@net wrote in message news:rbWZa.9683$2g.438@fed1read05... [snip] while in our papers you might find exact calculations of very different complex resonance systems which are fully consistent with the experiment. To make certain, come anew and see our paper ON COMPLEX RESONANCE VIBRATION SYSTEMS CALCULATION Sergey, can be, it will be of interest for you: http://www.shaping.ru/mku/butusov.asp RESONANCE OF WAVES OF BEATS and Johannes TITIUS LAW OF PLANETARY DISTANCES Butusov Kyrill P. Abstract. In the work it is demonstrated, that in a field of acoustic waves, that are aroused at the ac-count of the tidal action of planets, there may exist a special resonance, which we have called «beating waves resonance». This resonance arises wherever there exists equality between beating period and the sum or difference of the circulation periods of the two neighbouring planets (Beating period - being a quantity inverse of the difference between planets circulation frequences). In case of the sum, the periods ratio is equal to F - the Phidias Number, (F = 1,6180339), while in case of the difference the periods ratio is equal to F^2, (F^2 = 2,6180339). On this basis law was formulated named a Planet Periods Law, which says, that planets circulation periods form number sequences of Fibonacci and the one of Lucas. In second case the orbit radii form a geometrical progression with denominator F^4/3 (F^4/3 =1,899546). According to the Planet Distances Law of Johannes Titius, the orbit radii form a geometrical progression with the denominator 2, even though observational data give a value of 1,9. So we think that the Planet Distances Law is a sequel of the beating waves resonance and, accordingly, of the Planet Periods Law. LOGARITHMIC DISTURBANCE WAVES IN GRAVITATIONAL SYSTEMS AND STRUCTURAL DIAGRAM Butusov Kyrill P. Abstract. The idea of existence in gravitational systems of peculiar«logarithmic waves», the length of which – expressed in logarithmic scale of distances - remains constant, was stated by author in 1972. In present paper it is demonstrated that in gaseous-powdered matter the length of the disturbance wave which moves along the radius on to Sun from infinity is proportional to the distance to Sun, the increment of its fase being proportional to the increment of natural logarithm of that distance. The fase increment equal to 360 degrees corresponds to the increment of distance of the disturbance wave to Sun equal to 535,4914 times. For the second harmonic the distance increment should be 23,14068 times. In the movement of the Sun wind analogous processes should also take place. Therefore, in gaseous - powdered matter, which moves the oscillating in radial direction should develop standing «logarithmic waves» of disturbances. In the knots of these waves as in the «nutrition zones» there will occur accumulation of matter and more rapid growth of planets and satellites. The real picture of the orbits’ radii logarithms distribution actually has a descrete nature which is very clearly seen from the «Structural Diagram» of the Solar System. [snip] |
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
\(formerly\)" dlzc1.cox@net wrote in message news:miL0b.5777$Qy4.2607@fed1read05...
Dear Aleksandr Timofeev: "Aleksandr Timofeev" wrote in message om... \(formerly\)" dlzc1.cox@net wrote in message news:rSz0b.5442$Qy4.4087@fed1read05... ... Dear David please point even alone experiment of "interaction" really of free electron with "photon". I am absolutely sure, that you can not make it for a real _free_ electron. Photons are Compton scattered off of charges, to provide a gamma boost. I do not know if they have been done off of electrons. Your example is irrelevant. The Compton scattering always has a place for bound charges. I asked you to give an example of interaction of free "photon" and free "electron". Please David give an example of interaction of "photon" and absolutely free "electron". I do not like tricks with feeblly bound electrons. Then resonance cannot apply if there is no "real" binding force to provide the "spring". Because there are lots of other orbitals that the light *would* be in resonance with. The composite bound system always reacts as a unit to any external action. The composite bound system always has set of general-system resonances. For this reason the state transition of a system component is a general-system state transition of system as a whole. Once again I have in a view an example of interaction of isolated system consisting from free "photon" and free "electron". Please David give an example of interaction of "photon" and absolutely free "electron". |
#17
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
Dear Aleksandr Timofeev:
"Aleksandr Timofeev" wrote in message om... \(formerly\)" dlzc1.cox@net wrote in message news:miL0b.5777$Qy4.2607@fed1read05... .... Photons are Compton scattered off of charges, to provide a gamma boost. I do not know if they have been done off of electrons. Your example is irrelevant. The Compton scattering always has a place for bound charges. Unbound electrons, Alexsandr. It might be like stopping a bus with a fly, but it should be able to be done. I asked you to give an example of interaction of free "photon" and free "electron". Please David give an example of interaction of "photon" and absolutely free "electron". Done. Misunderstood, I suppose. I do not like tricks with feeblly bound electrons. Then resonance cannot apply if there is no "real" binding force to provide the "spring". Because there are lots of other orbitals that the light *would* be in resonance with. The composite bound system always reacts as a unit to any external action. The composite bound system always has set of general-system resonances. For this reason the state transition of a system component is a general-system state transition of system as a whole. Once again I have in a view an example of interaction of isolated system consisting from free "photon" and free "electron". Please David give an example of interaction of "photon" and absolutely free "electron". Done. Laser into an electron beam. Don't know if its been done, don't know if a measureable result has been looked for. But an example. David A. Smith |
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
"sean" wrote in message om... .... Refarding the resonance point I just did a google search on `resonance` and the few things I found were all describing resonace as a function of waves overlapping. thats why I couldnt understand dlzs claim that resonance couldnt be described as waves Hi Sean, I happened to come across this recently, it might help: http://colos1.fri.uni-lj.si/~colos/C...resonance.html It's a long URL so you will probably have to cut&paste onto a single line. HTH George |
#20
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Gravitation and Maxwell's Electrodynamics, BOUNDARY CONDITIONS
Dear Aleksandr Timofeev:
"Aleksandr Timofeev" wrote in message om... \(formerly\)" dlzc1.cox@net wrote in message news:xoy1b.8759$Qy4.7694@fed1read05... .... Unbound electrons, Alexsandr. It might be like stopping a bus with a fly, but it should be able to be done. Dear David, I have difficulties with physical interpretation of your thoughts. You and me both. Please explain your thoughts more detail. ---electrons--- ---photons--- And the interesting and possibly detectable interactions would be with an angle between the two beams. I do NOT know if this has been done. I do NOT know if this has EVER resulted in a detectable interaction. .... Done. Laser into an electron beam. Don't know if its been done, don't know if a measureable result has been looked for. But an example. The laser beam has too much individually of indistinguishable photons... ??? Ever look at the spoons in a drawer? They all tend to nest together. Photons are not like this. If they were, lasers would be easier. And they would not dissipate (as they do for LLR measurements). Lasers are like traffic lights (or better still, like traffic circles), that release a batch of photons with the "noses" of the little "cars" all lined up (within reason). To quote Uncle Al, you don't know if you don't look. (And we may have looked and found nothing.) David A. Smith |
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