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Physics behind a tube light

  1. Jul 1, 2015 #1
    Fluorescent lamps work by ionizing mercury vapor in a glass tube. So now mercury atom has electrons in the lowest energy level K and there can be maximum 2 electrons in this shell. Now when you turn on the light the electrons in the ground state i.e K shell get excited and move to the next energy level. So these 2 electrons get excited and when they return to the ground state again they emit light.

    Is this correct.
  2. jcsd
  3. Jul 2, 2015 #2


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