Astrophysics (Index)About

Paschen series

(hydrogen lines for electrons settling from n > 3 to n = 3)

The Paschen series is the set of emission lines from atomic hydrogen gas, due to electrons descending from an electron shell number n greater than 3 down to n = 3, 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 Friedrich Paschen. Lines:

Formula for wavelengths:

1/wavelength = RH ( 1/9 - 1/n² )

(Paschen,hydrogen,line series,lines,spectrum)
Further reading:
820nm366THz1.6eVbeginPaschen series
1875nm160THz661meVendPaschen series

Referenced by pages:
hydrogen (H)
spectral line