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German words in physics

  1. Feb 11, 2005 #1
    Hi all,

    in many English physics and mathematics texts I found German words like
    Bremsstrahlung, Eigenvector, Welcher-Weg-information, Gedankenexperiment, Ansatz, ...

    If you know more, then post them here.
     
  2. jcsd
  3. Feb 12, 2005 #2

    jtbell

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    Actually that one is a "hybrid" of German and English. The German word is Eigenvektor. Similarly we have "Eigenfunction" (Eigenfunktion) and "Eigenvalue" (Eigenwert).

    On my tests I sometimes ask students to define words or at least give an equation related to them. Once when I asked for Bremsstrahlung on an intro modern physics test, a student answered, "The sound you make when you try to talk with your mouth full of peanut butter." :rofl:

    (He was actually one of my better students... his mind simply went blank on that question)
     
  4. Feb 12, 2005 #3

    GENIERE

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    Galileo – First experimentalist

    DePretto - First to publish E=MC^2

    Galvani – Made 1st frog battery

    Volta – Improved frog battery

    Nobile – First to fly heavier-than-air craft

    Fermi – Made smaller atoms from bigger atoms

    Marconi – transmitted radio waves at the speed of light

    Meucci - Invented the Telephone

    :biggrin: :biggrin: :biggrin:
     
  5. Feb 12, 2005 #4

    dextercioby

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    Was it a joke...? :confused: If not,please infer me to a credible source (article in original,or just reference to that article) on this matter... :wink:

    Daniel.
     
  6. Feb 12, 2005 #5

    GENIERE

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  7. Feb 12, 2005 #6

    GENIERE

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    AS published, note large font.

    "La materia di un corpo qualunque, contiene in se stessa una somma di energia rappresentata dall'intera massa del corpo, che si muovesse tutta unita ed in blocco nello spazio, colla medesima velocità delle singole particelle. [...] La formula mv2 ci dà la forza viva e la formula mv2/8338 ci dà, espressa in calorie, tale energia. Dato adunque m=1 e v uguale a 300 milioni di metri [al secondo], che sarebbe la velocità della luce, ammessa anche per l'etere, ciascuno potrà vedere che si ottiene una quantità di calorie rappresentata da 10794 seguito da 9 zeri e cioè oltre dieci milioni di milioni" (pp. 458-459).

    http://www.dipmat.unipg.it/~bartocci/st/depretto.htm

    A poor translation:

    Matter contains energy represented by its mass. The formula mv2/8338 gives us this energy expressed in calories. M=1 and v =300 million meters/sec, the speed of light possible in the ether. Everyone can see the calories obtained is beyond 10 million million.


    ...
     
    Last edited: Feb 12, 2005
  8. Feb 12, 2005 #7
    reststrahlen

    About residual radiation in solid state physics, I think.
     
  9. Feb 12, 2005 #8

    dextercioby

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    Interesting...I guess we'll never know if Einstein inspired from other sources...

    Daniel.
     
  10. Feb 18, 2005 #9

    dextercioby

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    "Zitterbewegung"...For an explanation in the context of Dirac's equation,see Roger G.Newton:"Quantum Physics:A Text for Graduate Students",Springer Verlag,2002.

    Daniel.
     
  11. Feb 20, 2005 #10
  12. Feb 20, 2005 #11

    Janitor

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    In reading on the early history of quantum theory, I have seen the word Gespertenfeld, which is German for 'ghost field.'
     
  13. Feb 20, 2005 #12

    dextercioby

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    What...?In what context,please offer details...


    Daniel.
     
  14. Feb 20, 2005 #13

    Andrew Mason

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    This is a hoax. It was created by anti-semites who couldn't accept Einstein because he was jewish. It now appears to be working its way into mainstream lore.

    If you think about it for a moment, you will quickly realize that it cannot be true. First of all, how would such a speculation ever get published in a reputable journal? No one is suggesting that De Pretto was able to explain it. If De Pretto was a real person, he never contributed anything to science. He is supposed to have been an industrialist.

    But the real reason it can't be true is that it is not a concept but a mathematical relationship. It might be possible to conceive of the notion that matter was equivalent to energy but one cannot just intuitively guess that the relationship is E=mc^2. It would be like coming up with the 'concept' that centripetal force = mv^2/r without doing any math or understanding that F=ma. Impossible. Einstein only discovered the relationship as an after-thought after publishing his relativity paper in 1905. Einstein had no idea that matter and energy were equivalent until this relationship emerged from his analysis.

    AM
     
  15. Feb 20, 2005 #14

    dextercioby

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    Well,Andrew,if that article exists,then those anti-semites are right.It doesn't matter whether he was or not a physicist,he mai have been a janitor,for God's name,it matters only as a hystorical detail...

    Daniel.
     
  16. Feb 20, 2005 #15

    Janitor

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    I am not sure to whom Daniel was addressing that request. In case it was me, I just looked through some books on my shelf. There is one by Abe Pais which says that Einstein believed in the 1920s that a ghost field ("Gespensterfeld" is the correct spelling; pardon me) "showed the way" to corpuscular light quanta, and this ghost field determines the probabilty for a light quantum to take a definite path.
     
  17. Feb 20, 2005 #16

    Andrew Mason

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    I am suggesting that either the article does not exist or it does not say what is suggested. It is interesting that no one has produced the original article. I am saying that the suggestion that someone - a janitor, industrialist or physicist - came up with E = mc^2 by speculation is quite ludicrous. It is not a coincidence that this story is being promoted almost exclusively by anti-semites and aryan supremacists.

    AM
     
  18. Feb 20, 2005 #17

    dextercioby

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    To you;i've heard about Pais book,hmm,it looks interesting as a nonscientifical fact.I doubt the German name for "ghost field" is used anywhere in English...

    Daniel.
     
  19. Feb 20, 2005 #18

    Janitor

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    You are probably right about that, since I have maybe only seen that German word in the one book.
     
  20. Feb 20, 2005 #19

    dextercioby

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    I'd frankly doubt it has anything to do with his Jew origin...There have been other attempts do discredit Einstein's SR (even a book,in the 50's,close to his death,claimed that H.A.Lorentz & H.Poincaré are the only one which should diserve any credit),but this is definitely the most interesting...

    Anyway,to us physicists,Einstein will be Einstein...A German.

    Daniel.
     
  21. Feb 20, 2005 #20

    dextercioby

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    Honestly,why would it...?I mean,we in Romanian use the word "ghost",when we speak about ghost fields...Why would the English/American use this word,when the Germans have no contribution to the birth of this concept...?

    Daniel.
     
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