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Explain Rydberg formula

Rydberg formula (Rydberg): The formula that explains all of the characteristics of hydrogen's spectrum, comprising the Balmer, Paschen, Lyman, Brackett, and Pfund sequence.

For the transition between an electron in the orbital m to one in orbital n or the reverse, the wavelength lambda included is specified by:

1/lambda = R (1/m2 - 1/n2)

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