Astrophysics (index)

Paschen Series

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

The Paschen Series is Hydrogen (H) Spectral Lines from n greater than 3 to n = 3. Named after Friedrich Paschen. (As opposed to the Lyman Series and Balmer Series.)

Lines:

  • 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
Wavelength = RH × ( n-2 - m-2 )
  • RH is the Rydberg Constant for hydrogen, 1.09737316 x 107m-1 = 13.6eV / hc
  • m is the former level
  • n is the latter level

(Paschen,hydrogen,series,lines,spectrum)
http://en.wikipedia.org/wiki/Hydrogen_spectral_series
WaveLFreqPhoton
Energy
  
820nm366THz1.6eVbeginPaschen Series
1875nm160THz661meVendPaschen Series

Referenced by:
Hydrogen (H)
Spectral Line

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