What Are the Limitations of Rydberg's Equation in Atomic Spectroscopy?

[cottonz]

The teacher told us to start with Bohrs equation, E=-2.18x10^-18(z^2/n^2).
Then using ΔE= E_f - E_i , and E=λv.

Also what are the limitations of using Rydberg's equation?

Thanks

 

[Borek]

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