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Electrons and gases

  1. Mar 10, 2015 #1
    What type of gas would change the colour of an electron beam as the speed of the electrons increases?
  2. jcsd
  3. Mar 10, 2015 #2


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    Hi there James
    welcome to PF

    an electron beam doesn't have a colour

    but exciting a gas with a beam of electrons will cause the gas to glow
    this is called fluorescence :smile:

    have a look at this wiki link

    Last edited: Mar 10, 2015
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