Brackett series
The Brackett series is the series of spectral lines in the spectrum of the hydrogen atom , the lower energy level of which is in the N-shell .
Further series are the Lyman , Balmer (see also the explanations there), Paschen , Pfund and the Humphreys series .
spectrum
The spectral lines of the Brackett series are all in the infrared range of light. They were discovered in 1922 by the American astronomer Frederick Sumner Brackett .
n | 5 | 6th | 7th | 8th | 9 | |
---|---|---|---|---|---|---|
Wavelength (nm) | 4052.5 | 2625.9 | 2166.1 | 1945.1 | 1818.1 | 1458.0 |
Mathematical description
The wave numbers of the spectral lines are given by the formula
given is. Are in it
the Rydberg constant and whole numbers greater than 4.
The wavenumber can be determined by the relationship
in the wavelength , or through
convert into the energy of the associated photon . In the latter formula, the velocity of light in vacuo, and the Planck constant .
See also
Individual evidence
- ↑ a b H. Haken, HC Wolf: Atom- und Quantenphysik , Springer-Verlag (1980), ISBN 3-540-09889-5 , page 93