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March 29, 2017

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Calulate the wavelengths (in nm) of the visible lines in the line spectrum of hydrogen using the Rydberg equation (nf = 2; ni = 3, 4, 5, and 6)

I'm not sure how to do this; if someone could explain how to work it for one of the ni's, that would be a great help! Thank you! :)

  • Chemistry - ,

    It just substitution into the equation.
    1/wavelength = R(1/nf^2 - 1/ni^2)
    1/wavelength = R(1/4 - 1/9) for ni-3
    1/wavelength = R(1/4 - 1/16) for ni=4
    etc.

  • Chemistry - ,

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