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    I have a lab question, which asks me to give the energies for the first two terms in the lyman series for Hydrogen like atoms, in terms of units of "Rydbergs and Wavenumbers". I'm confused, because I've always known both in terms of cm-1.

    I've looked in my text books, and online, and nowhere else mentions Rydbergs as a type of unit...

    I've calculated the wavenumbers of the first two transitions, and calculated them into the energy by using E=hcv.

    No idea where to go from here
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    A Rydberg is a unit of energy. About 13.6 eV or about 2.1 \times 10^{-18} Joules
 
 
 
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