Talk:Matter wave

Fermi Wavelength

I notice that there is not an article in Wikipedia about the Fermi wavelength, but thinking about it maybe it is not significant enough to warrant its own article. Perhaps, instead, a section within this article? Casey boy (talk) 10:33, 17 May 2010 (UTC)

Ordering of Sections

The section on the Spatial Zeno effect should be moved to below the section on the experimental confirmation of the hypothesis. The Zeno effect is a very specific, highly technical example of the hypothesis and is probably meaningless to most people who visit this page. The subjects of the experimental confirmation sections are more accessible. --Mckinlayr 04:19, 4 June 2007 (UTC)

Linked 'de Broglie Wavelength' to here

This is what his discovery is commonly called - makes more sense if it redirects here.
--Blinken 11:40, 27 Apr 2005 (UTC)

Remove added text

I removed the following text added anonymously:

According to de Broglie, an electron bound to the nucleus behaves like a standing wave, such as the vibration of a plucked guitar string. Certain points along the wave do not move at all, these points are known as nodes. There is a node at each end and sometimes between the ends. The greater the frequency of vibration, the greater the number of notes and the shorter the wavelength.

De Broglie reasoned that if an electron does behave like a standing wavfe in the hydrogen atom, the length of the wave must fit the circumference of the orbit exactly. Otherwise the wave would partially cancel itself out on each successive orbit. Eventually the amplitude of the wave would be reduced to zero, and the wave would not exist.

My reason for removal is two-fold: 1) its in the wrong place in the article, it should appear later, 2) This was not de Broglie's idea; it was proposed considerably earlier, by Bohr .. the Bohr model of the atom aka the Bohr-Sommerfeld model. It was a semi-classical theory, with action-angle variables, and a nasty perturbation theory. Google says Bohr propsed this in 1913. See wolfram article linas 03:48, 27 November 2005 (UTC)

removed section on pronunciation of "de Broglie"

It belongs in the article about him, not here. Meeve 22:30, 7 December 2005 (UTC)

Waves of what???

which kind & of what nature exactly these waves are???

i read in some books that it is waves of probability, but actually I didn't understand this well.

I wish someone inform me about it.

thanks..

In 1923 this was not known yet - I think de Broglie assumed the particles themselves exhibited wave properties. Currently, it is understood that it is the quantum mechanical wave function that oscillates. Which is perhaps just another way of saying the same thing, since a particles wave function contains all there is to know about a particle's state. You'll find more information in Introduction to quantum mechanics and articles linked from there. Shinobu 14:50, 3 December 2006 (UTC)

Removed line "this equation is essentially wrong"

If this user thinks he has falsified a Nobel Prize-winning theory he should at least post it using his user name. A particle with zero velocity shouldn't be expected to show any wave-like behaviour; if it doesn't propagate, it isn't a wave. Someone more knowledgable than I may be able to explain this better. Shayno 12:34, 12 October 2006 (UTC)

I don't know what the anon said, but I think I should at least point out that a particle with zero velocity (say, an electron in a constant potential) tends to sort of spread out over space. Compare the lowest mode in the infinite box, which is just more dense at the center, but not really localized, or the lowest mode in the continuously repeating box, which is sort of everywhere, if my memory serves me right. None of this would falsify this theory. The wavelength just goes to infinity for stationary particles, as you would expect. Shinobu 14:33, 3 December 2006 (UTC)

Bogus

This is deBogus! There seems to be something wrong with the frequency formula. 128.250.50.92 07:20, 16 October 2006 (UTC)
Shayno 18:59, 31 October 2006 (UTC): deBogus no longer! Some anonymous user deleted 'em. Accident? Halloween prank? Who knows?!

Caps

"de Broglie hypothesis": caps inconsistent on the d and the h. Someone should check what is common usage in English and fix it. Shinobu 19:53, 3 December 2006 (UTC)

It should always be "de Broglie hypothesis". It should be consistent now. — Laura Scudder ☎ 21:48, 3 December 2006 (UTC)

Hypothesis?

Why is the word "hypothesis" in the article title? Is that what it's commonly called for some reason? If not, the name (and perhaps the text) should be changed to reflect the fact that everything in the article is extremely well-verified. -- SCZenz 21:03, 22 January 2007 (UTC)

I think it's typically called the "de Broglie hypothesis" because it was just a hypothesis at the time that de Broglie proposed it. It was experimentally confirmed in 1927 by the famous Davisson-Germer experiment, which demonstrated electron diffraction.

However, so far as I know there's no general rule for when you use the word "hypothesis" in physics (as opposed to "law", "theory", etc.) In my own rough estimation, a "law" is a single idea about the relationship between quantities (e.g., Newton's law of gravitation relating gravitational force to mass and the inverse square of distance), and a hypothesis is a single idea (not necessarily an equation) like "all matter has a wave-like nature", and a theory is a collection of laws and hypothesis purporting to explain some phenomenon. But there's no strict rules, and usually the names are simply historical artifacts (e.g., someone called it the "de Broglie hypothesis" and the name stuck.) All these terms can refer to ideas both before and after experimental confirmation -- the notion of a hypothesis getting "promoted" to a law after verification is generally not correct. --Tim314 15:08, 23 January 2007 (UTC)

There is a mistake in the Relativistic Frequency. Should have (gamma-1) not gamma —Preceding unsigned comment added by 201.203.168.138 (talk) 19:01, 21 September 2010 (UTC)

There may be a mistake in the equations that were written in this page

We can get Debroglie relation from the the equation of Einstein and Plank:
$E=hf=pc$
Where E is the energy possesed by an arbitrary photon relative to an intertial frame of reference, h is planck constant, f is its frequency in that frame.
$p={\frac {hf}{c}}={\frac {h}{\lambda }}$
Where $\lambda$ is the wavelength of the photon. We can then postulate that every moving body will have certain wavelength. The equation is experimentally proven to be correct for every body with non-zero rest mass. Similarly,
$f={\frac {pc}{h}}={\frac {mc^{2}}{h}}$
Where m is the relativistic mass of that photon. We can again postulate that every body with non-zero rest mass will have the frequency showing on the above equation. Since
$v_{p}=f\lambda$ where $v_{p}$ is the phase velocity. $v_{p}={\frac {c^{2}}{v}}$ Apparently, frequency of a body with non-zero rest mass is not directly proportional to its kinetic energy but its total energy or total relativistic mass. Thljcl 14:23, 25 March 2007 (UTC)

The problem with your math is at $pc=mc^{2}$. I assume you got at it by setting $E=pc$ equal to $E=mc^{2}$, but the first is the total energy of a massless particle, the second the total energy of a massive particle at rest.

Part of what was so unexpected about de Broglie's hypothesis was that he took equations for a massless particle and played with them until found something new that's true for massive particles. Unfortunately, it doesn't usually work that way. — Laura Scudder ☎ 21:55, 25 March 2007 (UTC)

For a particle with non-zero rest mass, when its momentum is zero relative to an inertial frame of reference, we find that

$E=m_{0}c^{2}$

Where E is the total energy, $m_{0}$is the rest mass of the particle, c is the speed of light in vacuum. When it possesses momentum in the same frame,

$E={\sqrt {m_{0}^{2}c^{4}+p^{2}c^{2}}}$$=\gamma m_{0}c^{2}$

$p=\gamma m_{0}v$

$\gamma =\;{\frac {1}{\sqrt {1-{\frac {v^{2}}{c^{2}}}}}}$

When v=0, $\gamma$=1,

$E=m_{0}\;c^{2}$ Classically, we define momentum as a product of mass and velocity. We can still use this definition. However,mass of a particular body is no longer a constant but is frame-dependent and is a function of its velocity. Whatever frame it is, its rest mass will be the same. Therefore, many or most scientists today would like to regard rest mass is the only definition of mass because variable mass may lead to a confusion. For me, I would still use both frame-dependent mass and invariant mass. In my maths, m always means relativistic mass. I will use $m_{0}$ denotes rest mass. Therefore,

$E=mc^{2}$

$E_{k}\;=(m-m_{0})c^{2}=(\gamma -1)m_{0}\;c^{2}$

Where $E_{k}$ denotes kinetic energy. For a particle with zero rest mass such as photon, its kinetic energy is ill-defined. The expression $E=mc^{2}$ is different from $E_{0}\;=m_{0}\;c^{2}$ where $E_{0}$ is a particle rest energy. I use E to denotes total energy. Wherever there's energy, there's always a certain amount of mass associate with it, though there may not be the rest energy. Certainly, photon has zero rest mass. It carries both momentum and energy.

$p=mc$

$E=hf=mc^{2}=pc$

Since many people dislike the term of relativistic mass, there's still an another way to derive the expression $E=pc$. That is from $E={\sqrt {m_{0}^{2}c^{4}+p^{2}c^{2}}}$ Let $m_{0}=0$,

$E=pc$

Therefore, the derivation of De Broglie is correct with his own postulate. He postulated that all body with non-zero rest mass also have wave-particle duality in nature just as photon does. He personally thinks that nature seems to love symmetry. Now, we discover that there is a violation of symmetery in weak interaction.

Thljcl 17:12, 26 March 2007 (UTC)

Your assertion made on 25 March 2007 is still incorrect, Thljcl. You said, "Apparently, frequency of a body with non-zero rest mass is not directly proportional to its kinetic energy but its total energy or total relativistic mass," which simply is not true, even by your own ``derivation. You state that the frequency of a body with non-zero rest mass is proportional to its total energy (including rest mass), but yet your last post assumes $m_{0}=0$ within the derivation -- so you've only shown that the frequency of a body with zero rest mass is proportional to its total energy. This is obviously true because the de Broglie relation contains the momentum term $p$, which from the equation

$E={\sqrt {m_{0}^{2}c^{4}+p^{2}c^{2}}}$,

which you state above, clearly has no dependence on rest mass $m_{0}$, as you previously asserted. Dchristle 20:52, 1 April 2007 (UTC)

In the Article "Phase velocity" they use the total energy instead of just the kinetic one to define the "frequency of matter waves". I don't know, what is correct, but I think the wrong one should be corrected, maybe including some motivation why it should be the total or just the kinetic energy.

Historical inaccuracy; Planck hypothesis

Two changes seem in order: First, I believe that the date of the de Broglie thesis defense at the Sorbonne was 25 November 1924. (Not 1923.)

The thesis was first published in 1925 (Ann. Phys. (Paris) 3, 22 (1925)).

De Broglie got the idea for matter waves in 1923, reportedly on his birthday, 15 August (See E. McKinnon, Am. J. Phys. 44, 1047 (1976)).

He published a short note concerning the phase of matter waves later that year, in Comptes Rendus de l'Academie des Sciences (vol. 177, pp. 507-510 (1923)). De Broglie included an analysis of the Bohr hydrogen atom model, requiring the electron's phase change by an integer multiple of 2[pi] around an orbit. The de Broglie wavelength, while implicit in his analysis, was not explicitly indicated as h/p; this, however, can be derived from the the wave's phase velocity and its frequency obtained through the Planck relationship E=h[nu]. (While his 1924 thesis was passed around and discussed in the physics community, this paper was resoundingly ignored. And is currently. It is not listed in his important publication on his Wikipedia site, for instance.)

So the first change to this article should be to change the thesis date to 1924, or to say that De Broglie got the idea of matter waves in 1923. Since it was only the 1924 work that was influential, the prefered date would be the 1924 thesis.

Second, it was Planck who proposed the Planck hypothesis in 1900 that energy and momentum are universally related through the Planck relationship E=h[nu]. It seems peculiar to call an energy-frequency relationship the "second de Broglie equation." Furthermore, if de Broglie wanted such an honor, he surely would have insisted that the energy include the relativistic rest mass, not the one presented in the article for the kinetic energy alone.

In both the 1923 Comptes Rendus paper and the 1924 thesis, de Broglie used as energy the particle's total relativistic energy to calculate the quantum frequency through the Planck relationship. The de Broglie relationship h/p gives the particle wavelength in both relativistic and non-relativistic treatments. However, the Planck frequency for a massive particle increases when the rest energy is included. De Broglie's convention of including the rest mass in the energy has several results: (1) the Planck energy-frequency relation gives a non-vanishing frequency for a massive particle at rest; (2) the phase velocity of de Broglie's "de Broglie" waves exceeds the velocity of light. McKinnon (loc. cit.) makes clear that de Broglie held onto this relativistic definition of the Planck frequency tenatiously, even after the introduction of Schroedinger's non-relativistic wave equation, where a free particle at rest has zero frequency and phase velocities are less than the speed of light.

As has been pointed out by other commentators, the derivation of the de Broglie momentum-wavelength relationship by combining the Planck energy-frequency relationship and Einstein's relativity proceeds only if the relativistic total energy, including the rest mass, is used. This was de Broglie's discovery, and the basis for his PhD.

It would be more historical to call an energy-frequency relationship a Planck relationship. Possibly the section on the "second de Broglie equation" could be renamed, or not named at all.

Or, it would seem fitting, if "de Broglie hypothesis" gets an article all by itself, wouldn't symmetry suggest a "Planck hypothesis" article? This material could be moved there. Or, since there exists a "Planck postulate" article, placed there.

128.223.23.123 00:01, 12 April 2007 (UTC)

---

Well, since de Broglie took total energy in the relation for matter wave frequency in his thesis, then the so-called "second de Broglie equation" should be corrected. Another reference that total energy was used is from the Quantum Mechanics part (Vol III) of Feynman Lectures On Physics, though Feynman mentioned the zero of energy can be moved arbitrarily (so as to the frequency). --Kris Huang 19:55, 19 July 2007 (UTC)

Nobel prize for PhD thesis

I believe that Johannes Diderik van der Waals, which received the Nobel prize in physics in 1910, also got it on the grounds of his PhD work. Which means that de Broglie at east wasn't the first. —Preceding unsigned comment added by 152.94.13.82 (talk) 15:43, 7 November 2007 (UTC)

van der Waals obtained his PhD about half a century before the prize; de Broglie's Nobel prize was awarded about half a decade after his PhD. ~ Jafet _{Speaker of many words} 15:02, 25 August 2008 (UTC)

References

Erreferentziak: Originally, the here quoted reference of the excellent publication about Prof. Vallée was included too:

• Broglie, Louis de, The wave nature of the electron, Nobel Lecture, December 12, 1929
• René Louis Vallée: L'énergie électromagnétique matérielle et gravitationnelle, Masson & Cie, éditeurs - Paris, 1971 — traduction libre par : D.A. Borgdorff, relativement: "hypothése d'existence des milieux énergétiques et d'une valeur limite supérieure du champ électrique". Ibidem via la SEPED – Paris, 1978 - La théorie Synergétique (Template:Fr)

Θ ing° D.A. Borgdorff MASc EE: 86.83.155.44 12:53, 27 Otsaila 2008 (UTC) and here: 86.83.155.44 (talk) 21:04, 27 February 2008 (UTC)

Please don't link to http://jlnlabs.online.fr/ -- it is not a reliable source. --Pjacobi (talk) 11:53, 15 June 2008 (UTC)

I'll hold on your request, as forced in Germany stated. D.A.Borgdorff numbered by IP: 86.83.155.44 (talk) 15:06, 27 June 2008 (UTC)

Editwar

I've reported the ongoing editwar at Wikipedia:Administrators' noticeboard/3RR. Wouldn't it be a good idea to take the time and discuss the merits of the reference? Guido den Broeder (talk) 19:48, 27 June 2008 (UTC)

As stated above: I hold my promise though mr. W.Waggel and mrs. M.Moira vandalised -- by reverting from mr. E.Baas onwards continuously -- my very relevant Scientific reference translated. Not including the ex-link to the jlnlabs anymore. Regards: D.A. Borgdorff PEng AIEE FRIEN = 86.83.155.44 (talk) 18:47, 28 June 2008 (UTC)

Thanks Guido, the page is now semiprotected so you and I can edit it, but 86.83.155.44 cannot. FYI: the merits of the reference have been extensively discussed on nl:Overleg_gebruiker:86.83.155.44 and found to be lacking by all participants (except for mr Borgdorff). Vallee is a crackpot. On other wikipedias it was hardly deemed worthy of discussion and removed fortwith. Wammes Waggel (talk) 21:43, 28 June 2008 (UTC)

Nonetheless, all of you behaved badly here. Guido den Broeder (talk) 22:47, 28 June 2008 (UTC)

To the attention of mr. W. Waggel s.s.t.t.:

It's obvious that you studied nor comprehend the deep QED cq QM discrepancy that isolated on age Hon.Mr. De Broglie, together with Bohm (circa ultimo sixties) from the other quantumphysicists in their understanding of the existance of really Material Waves. Apparently with your remarks have no notion of "what matters". Though Yrs → D.A. Borgdorff = 86.83.155.44 (talk) 23:01, 28 June 2008 (UTC) See also: Bohm interpretation and in de:De-Broglie-Bohm-Theorie.

Moreover: never taking the reference seriously and even spells his name unconsciously wrong ... apparently without an apologetic response. Again: dAb → 86.83.155.44 (talk) 23:18, 28 June 2008 (UTC)

Oh, I've read it. It's baloney. You should read e.g. QED by Richard Feynman - contrary to Vallee, even the book has an article here. By the way, I do not know where you got the notion that I am "mr" - I am Wammes Waggel (M/V) to you. Respectfully yours, working under pseudonym Wammes Waggel (talk) 23:28, 28 June 2008 (UTC)

If you had read my pages more well, you'd understand that I already for a long time (~ 40 years) ago about those same years worked in the nuclear reactor of IRI THDelft, where Prof.dr. Van Dam promoted, and after time contacted many of the most erudited in Holland whose names I quoted there on my talkpage and else. E.G. I responded to mr. Robotje - opus citatum:

Geachte heer, ik zal maar duiden dat een atoom als nog geen deel-baar elementair deel-tje werd beschouwd, totdat anders bleek middels enige soorten Higgs-bosonen, ijkfotonen, gravitonen, quarks & leptonen, welke als elementairder werden beschouwd, hoewel thans de huidige inzichten "in the eyes of the beholder: back to the basics" weer algemeen gewag maken van energetische vortices, in een ruimtelijke matrix van gebroken nl:CPT-symmetrie, ondanks fijn 'besnaarde' recente ontwikkelingen. Lees anders eens van K.P. Sinha & N. Kumar over en:Interactions in Magnetically Ordered Solids in hun Exchange Coupling en Magnon-Phonon relaxation, dus: de interacties (mv) tussen fotonen, magnonen en fononen, - of ook het interessante werk van bijvoorbeeld Chris Quigg over Gaugefields etc., dat in renormalisation met nl:Lie-groepstheoretische aspecten verband houdt evenals deze nl:materiegolven de gehele interne en externe nl:kwantumfysica bestrijken. Vriendelijk dank voor uw belangstelling heer Robotje met een beleefde groet: - D.A. Borgdorff 86.83.155.44 12 feb 2008 13:16 (CET) Denk ook eens aan bijvoorbeeld de nl:dichotomie inzake de nl:EPR-paradox!

You'll have to understand that I not only digested Richard Feynman's works, but papers of Steven Weinberg and id. Hawking, Fred Hoyle et al, apart from told very learned Dutch physicists from Casimir till 't Hooft. — Further to your gender was known of male attitude, and yourself chosen occultistics led that easy to misinformation. My name is openly ever the same. Not obscured but: D.A. Borgdorff with titles stated before. 86.83.155.44 (talk) 00:14, 29 June 2008 (UTC) → P.S.: I'll also have to draw your attention to the very recent publication from nl:Marcoen Cabbolet M.J.T.F.: Elementary Process Theory here with ISBN 978-90-5972-232-3 -- where the book of Krityunjai Prasad Sinha, Narendra Kumar ISBN 0-19-851423-9 has been dedicated to prof.dr. M.H.L. Pryce and "Gauge Theories"... by Quigg has ISBN 0-8053-6020-4.

I have put back the reference to Vallée. Vallée worked closely together with De Broglie, and although his vision was not mainstream science, it certainly is noteworthy information. A first hand source for infromation on the theories of De Broglie. That this publication was not printed in big editions is not unusual: in the '70's there was no internet, many publications were typed by hand and then copied, especially information that contained other visions on items like quantum mechanics, which was more mainstream. many academic printers refused to print big editions of specialized academic information, because it did not 'sell' enough and therefor was not commercially interesting to them. That's why this source can be of quite big value for researchers nowadays (even when the theory contained in it is a bit 'dated' compared to modern scientific views and mainstream ideas), and people who look for more information into these theses of De Broglie. So a reference to this publication (which is available on the internet nowadays) is a good source for further studies. Vallée was seen as a outsider in the field just because his ideas were controversial. But did Einstein also start as a mainstream academic? DTBone (talk) 00:02, 29 June 2008 (UTC)

Vallée was an electrical engineer, in the 1960's working on digital electronics. In what way was he associated with de Broglie? /Pieter Kuiper (talk) 06:39, 4 July 2008 (UTC)

As have been proven - and also stated months ago in Holland - he was from ultimo sixties on involved with the late different point of view from De Broglie, compared with his QM colleagues in that decennium. Vallée was a QED-specialist and engineering professor in France's "nuclear" State service where his work was classified. I told you (...) so plenty of times. \ dAb / by 86.83.155.44 (talk) 12:52, 4 July 2008 (UTC)

Mr. Borgdorff, your credentials are not at issue here. Nor are they relevant. If mr Vallee is so great, may I humbly suggest you write an article about him here. Your reference would certainly be acceptable on that article. Not, however, here. It's baloney. You, who maintains to be so well versed in this subject, would have little trouble finding better references and literature than Vallee. And mr DTbone, I suspect that you are introducing a new phenomenon, cross wiki sockpuppetry (using different usernames on different wikipedias to intentionally hide that they are the same person). Interesting. I question your ability to judge the merits of said reference and have once more removed it. Feel free to once again report an editwar. Regards, Wammes Waggel (talk) 14:49, 29 June 2008 (UTC)

For your first remark mr. "Waggel", see into my French talkpage here and lemmata about synergy there, as well as my comments further on. -\ ir. D.A. Borgdorff MASc E.E. => unto 86.83.155.44 (talk) 09:30, 1 July 2008 (UTC)

@Wammes Waggel: I have some foreign language accounts, which I only use for honest and open editting. I dont use them as sockpuppets at all, because sockpuppets are supposed to be used to obscure an identity. I never lied over who I am, i.e. Tjako van Schie, pianist and composer, living in the Netherlands, Nieuwleusen, I am 47 years old, married, have 2 children, have been very active on the Dutch wiki since november 2007, where I contributed over 5200 edits in the main space area, and started many new articles. I have been fighting vandalism, reviewed new edits and new articles, and am an active and serious contributor in many serious wikiconcerning debates over there. You may know everything about me except my pincode and passwords. Here I am registered as user Dutch T-bone, on the nl wiki as gebruiker:Tjako, on the spanish and nls (Nedersaksisch) wiki as Pling, and on the others I have not yet registered, but sometimes contribute under my IP address, mainly for adding crosswiki references (interwiki links in articles), sometimes to discuss other important things with e.g. Mr. Borgdorff and/or others, mr. Borgdorff especially got my attention, because he is currently blocked for a month on the Dutch wiki for merely editing 2 characters in one of his own talk contributions, which is the most ridiculous thing where an admin abuses his buttons and doesn't even have to say 'sorry'. So put those stupid allegations of crosswiki sockpuppetry away immediately, and start serious rethinking of the allegations you've been accusing me as well as Borgdorff of. Regards, DTBone (talk) 18:01, 30 June 2008 (UTC)

You still don't understand, do(n't) you.? Though esteem: D.A. Borgdorff - e.i. through 86.83.155.44 (talk) 15:11, 29 June 2008 (UTC) Sr.Don Wammes W.

I don't understand the relevance of your reference, because you have not substantiated the relevance of your reference. Your credentials and history of employment and mention of famous physicists do not substantiate the relevance of your reference. And your mr Cabbolet failed to get his PhD because his thesis was found lacking. And indeed, I do not understand what Cabbolet has to do with Vallee, except that maybe he is also an unrecognized genius in your opinion. Cabbolet also does not make your reference any more relevant. I strongly urge you to write that article about Vallee though, you seem to be in an excellent position to do so. Regards, Wammes Waggel (talk) Esq. 15:44, 29 June 2008 (UTC)

If you know it better, write it yourself - that will do !. And don't keep as MoiraMoira - going on vandalising my international edits involved, please. Wishing you succes and all the best. Always D.A. Borgdorff with → 86.83.155.44 (talk) 18:44, 29 June 2008 (UTC)

See again this recently spoken of on the Help-page: [1] and [2]. → With great respect and kind regards from: D.A. Borgdorff c.q. 86.83.155.44 (talk) 11:49, 30 June 2008 (UTC) abbrieviated as dAb +>

A reference about a fringe theory by mr Vallee is not relevant to the subject of this article. Wammes Waggel (talk) 05:55, 4 July 2008 (UTC)

Unfortunately you are going on to disrupt the importance of the Hon.: prof. R.-L. Vallée, as well as my contributions of messenger interrelated to most works of De Broglie. This is still indignified upheaval ... of which I stay aloof from. Truly Yrs: \ dAb / +> 86.83.155.44 (talk) 09:39, 4 July 2008 (UTC)

Because of a suddenly blocking up from action by Robotje - while defending me - I'll have to (re)place the (un)finished text hereunder in España.wiki:

On the contrary: ¡ Don't take that very important reference away without discussion first.! You are nó more worth than any other user ...nl:G:dAb via —86.83.155.44 (discusión) 10:08 4 jul 2008 (UTC) → Post scriptum: the lie that in France is no article about Vallée is proved by fr:Synergie in paragraph Physique synergétique. Always, atentamente D.A. Borgdorff: —86.83.155.44 (discusión) 10:35 4 jul 2008 (UTC) → PS: I also clearly stated that the work eruditely published from De Broglie's 'own' Masson & Cie on this topic of M° René-Louis Vallée - mi traslado incluido - had been "classified" by the Public French National State Atomic CEA ultimo 1974 for obvious reasons. Saludos Cordiales y Atte: D.A. Borgdorff —86.83.155.44 (discusión) 11:14 5 jul 2008 (UTC)

Hoping someone been able to copy/paste insert this into the proper Spanish "equivalent" talkpage overthere ... Thanks in advance for your service. Obliged sincerely yours: D.A. Borgdorff still from 86.83.155.44 (talk) 10:56, 4 July 2008 (UTC)

Hi dAb, apparently, nobody on any version of Wikipedia ever took the trouble to explain this to you, so let me try. The general rule is that if an addition to an article is disputed, then it must be left out until such time that consensus for inclusion is reached. It does not matter whether you are right. This can indeed be very frustrating at times, since there are many ignorant people around.

Personally, I would rather have a different setup, where the opinion of knowledgeable contributors carries more weight, but unfortunately the rules are what they are, and the quality of the articles will therefore be lacking. Take into account that Wikipedia is an experiment; we will learn from it how to do better with the next generation of community-maintained encyclopediae.

Now, specifically with regard to references, unless it is a general source of information, the text should indicate why it is important to include it. That is, it should be referred to explicitly. For instance: "according to one study, ...", followed by the title between ref tags. That way, it is immediately clear to readers as well as other contributors why the reference may be relevant.

A translation of a reference can only be relevant if it helps the reader. So, a translation of a French text into Dutch would typically only be of interest on nl:Wikipedia, but not on en:Wikipedia.

If a dispute continues, i.e. users cannot come to an agreement, there are ways to get help. These ways differ between language versions, so if you don't know what to do to try and get a dispute resolved, ask any admin, or a helpdesk, or some such. Reverting is not the answer, and will only get the page protected. Guido den Broeder (talk) 12:44, 4 July 2008 (UTC)

Thank you mr. G. den Broeder MSc for your advice, which I responded to on my talkpage in Spain: here to take into account. With regards D.A. Borgdorff 86.83.155.44 (talk) 15:04, 4 July 2008 (UTC) → PS: on metawiki as well as some talkpages of colleagues here and else in Spain, I further explained the meaning of Vallée's references in relation with paradoxes of De Broglie, e.g. abovementioned Bohm interpretation of De Broglie-Bohm Theory. Sincerely: D.A. Borgdorff = 86.83.155.44 (talk) 18:44, 8 July 2008 (UTC)

The above Dutch mentioned translation of the book from Masson & Cie, Éditeurs: René-Louis Vallée: L'énergie électromagnétique matérielle et gravitationnelle - Paris, 1971 - is not the problem itself, but was so notified ... it was the classified edition itself (with all kinds of occult translations) that is contested of as: en:fringe science with yawns from a couple of biased persons with prejudice.!! This bias is awarded though, unfortunately. Kind regards: D.A. Borgdorff, e.i. = 86.83.155.44 10:53, 6 July 2008 (UTC) Further, I'm blocked up again, this time by user:Oscar 3 months for same reasons which are not scientific at all, of which I complained though. dAb = 86.83.155.44 (talk) 11:27, 11 July 2008 (UTC)

Move from 'De Broglie wave' to 'Matter wave'

I'd like to question the Jan 11 move of this article from 'De Broglie wave' to 'Matter wave'. I don't believe many physicists use the term, they use 'wavefunction', or 'De Broglie wave' when referring to historical quantum mechanics. 'Matter wave' is a descriptive term used in elementary explanations of quantum mechanics. I don't necessarily oppose the move, but I'd like to hear what others think. --Chetvorno^TALK 12:00, 13 March 2009 (UTC)

Matter waves seem to show up quite a bit in papers about condensed matter physics. I'm not clear if that is the same topic as de Broglie waves.—RJH (talk) 20:35, 4 August 2009 (UTC)

Spatial Zeno effect

If an object (particle) is observed with frequency $\Omega \gg \omega$ in a half-space (say, $y<0$), then this observation prevents the particle, which stays in the half-space $y>0$ from entry into this half-space $y<0$.

Huh? I presume this means "If an object (particle) is observed with frequency $\Omega \gg \omega$ in a half-space (say, $y<0$), then this observation prevents the particle, which stays in the other half-space ($y>0$), from entering this half-space ($y<0$)."

However, I haven't studied this stuff, so someone should check it. While you're there, you can bypass a redirect (Zeno effect -> Quantum Zeno effect). Brian Jason Drake 08:55, 18 April 2009 (UTC)

• I don't claim to be a expert but I'm sick of the ambiguous term "Observe" when used on systems of this scale. One might say Sessile Fielder observes the baseball with his bat. In essence this is the saying the same thing. Now we can put away our faerie crystals and get back to science.

The de Broglie relations

I removed the following sentences as they are redundant, unclear and (as far as I can see) insignificant.

The greater the energy, the larger the frequency and the shorter (smaller) the wavelength. Given the relationship between wavelength and frequency, it follows that short wavelengths are more energetic than long wavelengths.

Brian Jason Drake 08:04, 22 April 2009 (UTC)

pronunciation

The French pronunciation is linked at Louis de Broglie. It's irrelevant here, where we need the English pronunciation. We can have it in addition to the English, though I fail to see the point, since no-one uses the French pronunciation when talking QM in English. kwami (talk) 17:31, 5 May 2009 (UTC)

Multiple particles

This article should discuss the quantum mechanical derivation of the de Broglie wavelength for a system of several particles. (The proof is not too complicated, but I cannot remember it now. It is a common question if there is a physical sense of speaking of the atom/molecule/ball wavelength. It is, but it should be demonstrated clearly why.) --FDominec (talk) 23:12, 26 February 2011 (UTC)

Frequency

If E is the kinetic energy of the particle, $E=mv^{2}/2=\gamma m_{0}v^{2}/2$. That's not wat the article says Nijdam (talk) 17:13, 2 July 2011 (UTC)

The relativistic equation for total energy is $E=\gamma m_{0}c^{2}$. The kinetic energy is given by the total energy minus the rest energy: $E_{kin}=\gamma m_{0}c^{2}-m_{0}c^{2}=(\gamma -1)m_{0}c^{2}$.Ragnarstroberg (talk) 23:38, 12 September 2011 (UTC)

Function?

in the history section it says that the wave length is a function of Planck's constant. This seems a strange way of expressing to me, what is the meaning of a function of a constant? Nijdam (talk) 20:28, 6 August 2011 (UTC)

I changed this to "equal to". I think this makes more sense.Ragnarstroberg (talk) 23:40, 12 September 2011 (UTC)

Historical Context

I think the Historical Context section should be overhauled. Einstein's equations relating wavelength and momentum for a photon should be given for context, and the connection with Niels Bohr and the Rydberg equation should be either be made more explicit or dropped. Also, the discussion of the wavelength at different scales belongs in a different section - it's not historical. If there are no objections, I'll make the changes when I get a chance.Ragnarstroberg (talk) 03:44, 13 September 2011 (UTC)

Compton Scattering

I changed the line

"Just as Arthur Compton demonstrated the particle nature of light"

to

"Just as the photoelectric effect demonstrated the particle nature of light"

because Compton scattering wasn't observed until 1923 whereas the photoelectic effect goes back to Lenard's work in the 19th Century, — Preceding unsigned comment added by WeOwnTheNight (talk • contribs) 18:27, 2 October 2011 (UTC)