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    bscampbell's Avatar
    bscampbell Posts: 1, Reputation: 1
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    #1

    Oct 9, 2012, 12:02 PM
    Wavelenght
    When an electron of an excited hydrogen atom falls from level n=2 to level n=1, what wavelength of light is emitted?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 10, 2012, 03:39 AM
    Post your attempt please

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