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Emission from hydrogen discharge tube

  1. Dec 21, 2013 #1

    utkarshakash

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    1. The problem statement, all variables and given/known data
    In a lab experiment on emission from atomic hydrogen in a discharge tube only a small number of lines are observed whereas a large number of lines are present in the hydrogen spectrum of a star. Why?

    3. The attempt at a solution

    I think it is related to temperatue but I don't know why.
     
  2. jcsd
  3. Dec 21, 2013 #2

    Simon Bridge

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    The lines come from atomic transitions.
    What determines which transitions can happen and which get observed?
     
  4. Dec 22, 2013 #3

    utkarshakash

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    The photons
     
  5. Dec 22, 2013 #4

    Simon Bridge

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    The photons come from the transitions - what determines which transitions can happen and which get observed?
    Do you know how a gas-discharge tube makes light? Why it is a particular color?
     
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