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Brackett series

(hydrogen lines for electrons settling from n > 4 to n = 4)

The Brackett series is the set of emission lines from atomic hydrogen gas, due to electrons descending from an electron shell number n greater than 4 down to n = 4, or the analogous absorption lines when absorbed electromagnetic radiation makes electrons do the opposite. It is one of the hydrogen line series, such as the Lyman series and Balmer series and is named after Frederick Sumner Brackett. Lines:

Formula for the wavelengths:

1/wavelength = RH ( 1/16 - 1/n² )

(Brackett,hydrogen,line series,lines,spectrum)
Further reading:
1458nm206THz850meVbeginBrackett series
4050nm74THz306meVendBrackett series

Referenced by pages:
hydrogen (H)
spectral line