(hydrogen lines for electrons settling from n > 3 to n = 3)
The Paschen series is the set of
hydrogen spectral lines emitted
when an electron descends from
an electron shell number n greater than 3 down to n = 3,
or the analogous absorption lines when absorbed electromagnetic radiation
makes the electron 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.
- 4 -> 3: 1875 nm
- 5 -> 3: 1282 nm
- 6 -> 3: 1094 nm
- 7 -> 3: 1009 nm
- 8 -> 3: 995 nm
- 9 -> 3: 887 nm
- infinity -> 3: 820 nm
Formula for wavelengths:
1/wavelength = RH ( 1/9 - 1/n² )
- RH is the Rydberg constant for hydrogen, 1.09737316 × 107m-1 = 13.6 eV / hc
- n is the higher electron shell number.
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