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Sparks in vacuum?

  1. Feb 14, 2008 #1
    Hello!
    I know that in dry air at about 3 000 000 V/m of an electric field we will see sparks between to conductors charged with a Van Der Graaff machine. Now suppose that we can do that experiment in vacuum.
    I suppose that no sparks will be seen; there is no air!
    Anyway electrons will flow from one conductor to the other in vacuum, i suppose! If so, they are accelerated and they will radiate energy. (I´ve learned that an accelerated charge emits electromagnetic radiation) How can i calculate the characteristics of that electromagnetic radiation (frequency and wavelength)?
    TIA :smile:
     
  2. jcsd
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