Timeline for Are E and B fields synchronous in light waves?
Current License: CC BY-SA 3.0
16 events
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| Aug 29, 2016 at 11:02 | comment | added | anna v | @garyp The paper discusses frequencies, i.e. the study is on monochromatic slices of black body radiation. Radiation comes altogether jumbled frequencies at time t. imo E B correlation has no meaning for an individual photon, as the E and B are in the wavefunction in a complex number. For the emergent wave of course they are correlated, depending on the boundary conditions | |
| Aug 29, 2016 at 10:51 | comment | added | garyp | @annav A theoretical calculation of the coherence length. Thanks. I don't quite understand your comment about breaking into frequencies. Still nothing on E - B correlation. | |
| Aug 29, 2016 at 4:55 | vote | accept | CommunityBot | ||
| Aug 29, 2016 at 9:27 | |||||
| Aug 29, 2016 at 3:23 | comment | added | anna v | seems to me if one breaks down the black body radiation into frequencies /plarizations then coherence lengths can be defined. But this is a different story imo | |
| Aug 29, 2016 at 3:15 | comment | added | anna v | @garyp see above link | |
| Aug 29, 2016 at 3:15 | comment | added | anna v | @DanielSank hank.uoregon.edu/teaching-modules/Broadband-Interferometer/… | |
| Aug 28, 2016 at 23:27 | comment | added | garyp | @DanielSank I suppose someone has measured the coherence time of sunlight/starlight and it is certainly not zero. But there is confusion among questions and answers here: are we talking about E-E correlations, or E-B correlations? I'm never quite sure who's addressing what. | |
| Aug 28, 2016 at 23:12 | comment | added | DanielSank | Surely light coming from the sun has a non-zero correlation time. I wonder what it is. If starlight were entirely incoherent I think the Hanburry-Brown Twiss effect wouldn't work, but I'm not completely sure if that's true. | |
| Aug 22, 2016 at 11:49 | comment | added | anna v | FOR INDIVIDUAL PHOTONS , the quantum mechanical substructure. One does have faith that validated theories mathematically describe unreachable spaces. The classical wave has been validating maxwell's equations from their conception | |
| Aug 22, 2016 at 8:56 | comment | added | user104372 | Am I missing something, or are you actually saying that the fields and consequently their phases have never and can never be detected, and we must believe in their syncronicity as an act of faith to Maxwell's theory? | |
| Aug 22, 2016 at 5:26 | comment | added | anna v | As far as photons go, the phases is seen only in the built up probability density distribution. This mathematically coincides with the energy distribution of the classical wave, because both the classical and the quantum form come from maxwell's equation, for photons used as operators on the wavefunction. arxiv.org/ftp/quant-ph/papers/0604/0604169.pdf | |
| Aug 22, 2016 at 5:24 | comment | added | anna v | It is not the electric field of the photons. The electric field of the photon is in a complex number form in the wavefuncion. The interactions of photons always happen with the square of the wavefunction, so the electric field of a photon is not a measurable quantity. The antena picks up the field built up by the zillions of photons in the wave. The coherence of the laser light is a coherence in the electric field waveform. This phase can will be mathematically found in the complex phases of the wavefunction but is not measurable. only the confluence/supeposition of photons is measurable | |
| Aug 22, 2016 at 4:34 | comment | added | user104372 | anna, the electric field caught at the antenna is not the field of the photons, (is it? ) but the field caused by them making the electron in the antenna oscillate. It is therefore obvious that that E-field is synchronous with the incoming B-field of the radiation. Don't you agreee they have it all mixed up? | |
| Aug 21, 2016 at 19:55 | comment | added | anna v | laser light is coherent hyperphysics.phy-astr.gsu.edu/hbase/optmod/lascon.html . I do not think people bother with the magnetic field of an incoming electromagnetic wave. The electric field is what is caught at the antennas and registered. | |
| Aug 21, 2016 at 12:37 | vote | accept | CommunityBot | ||
| Aug 29, 2016 at 4:54 | |||||
| Aug 21, 2016 at 12:35 | history | answered | anna v | CC BY-SA 3.0 |