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    albear's Avatar
    albear Posts: 1,594, Reputation: 222
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    #1

    Jun 13, 2007, 01:57 PM
    Hydrogen balmer absorption lines
    Which spectral classes do these mostly apply to and why, how can I find out
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #2

    Jun 13, 2007, 11:33 PM
    I'm not entirely sure of the question but the Balmer absorption lines refer to the light of the energy to raise electrons from the n=2 to higher orbitals in the Hydrogen atom.

    I'm not sure what you mean by "spectral classes".

    More info: Balmer series - Wikipedia, the free encyclopedia
    albear's Avatar
    albear Posts: 1,594, Reputation: 222
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    #3

    Jun 14, 2007, 09:20 AM
    Thanks,by spectralclassesi meant OBAFGKM it was A and B but I didn't know why
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #4

    Jun 14, 2007, 10:30 AM
    What on earth is OBAFGKM? :P
    albear's Avatar
    albear Posts: 1,594, Reputation: 222
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    #5

    Jun 14, 2007, 10:44 AM
    The spectral groups from blackbody radiation
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #6

    Jun 14, 2007, 10:56 AM
    I had actually never come across that clasification, I just would classify it by temperature, so our sun is a 5800K blackbody.

    Interesting :)
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