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Homework Help: Spectral emmision line width

  1. Sep 17, 2006 #1
    I have no ideal where to begin on this question.

    Light of wavelength 0.6x10^-6 meters is emmited by an electron in an atom behaving as a lightly damped SHM with a Q factor of 5x10^7. Determine the width of the spectral emmision line.

    I am thinking E=hv=A^2

    where A^2=Q^2 for large Q.

    but, in all realality, I am just pulling these relationships from the text. I dont intuitivly understand why Amplitute and the Q value would roughly be the same, nor do I understand why Energy would equal just A^2, as opposed to A^2cos^2(wt).
     
  2. jcsd
  3. Sep 20, 2006 #2

    Meir Achuz

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    [itex]\Gamma=2\pi\nu/Q[/itex].
     
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