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In physics, the spectral lines of hydrogen correspond to particular jumps of the electron between energy levels. The simplest model of the hydrogen atom is given by the Bohr model. When an electron jumps from a higher energy to a lower, a photon of a specific wavelength is emitted according to the Rydberg formula:
where n is the initial energy level and n' is the final energy level, and R is the Rydberg constant.
The spectral lines are grouped into series according to n' :
n'
|
Series name
|
| 1 |
Lyman |
| 2 |
Balmer |
| 3 |
Paschen |
| 4 |
Brackett |
| 5 |
Pfund |
| 6 |
Humphreys |
Lyman Series
|
|
Balmer Series
|
n
|
λ(nm)
|
|
n
|
λ(nm)
|
| 2 |
122 |
|
3 |
656 |
| 3 |
103 |
|
4 |
486 |
| 4 |
97.2 |
|
5 |
434 |
| 5 |
94.9 |
|
6 |
410 |
| 6 |
93.7 |
|
7 |
397 |
 |
91.1 |
|
|
365 |
Paschen Series
|
|
Brackett Series
|
n
|
λ(nm)
|
|
n
|
λ(nm)
|
| 4 |
1870 |
|
5 |
4050 |
| 5 |
1280 |
|
6 |
2630 |
| 6 |
1090 |
|
7 |
2170 |
| 7 |
1000 |
|
8 |
1940 |
| 8 |
954 |
|
9 |
1820 |
|
820 |
|
|
1460 |
Pfund Series
|
|
Humphreys Series
|
n
|
λ(nm)
|
|
n
|
λ(nm)
|
| 6 |
7460 |
|
7 |
12372 |
| 7 |
4650 |
|
8 |
7503 |
| 8 |
3740 |
|
10 |
5129 |
| 9 |
3300 |
|
11 |
4673 |
| 10 |
3040 |
|
13 |
4171 |
|
2280 |
|
|
3282 |
[edit] See also
