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| abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > hydrogen line > Balmer line |
| Balmer line comparison table | ||||||
| Subject | has discoverer | has upper energy level | has dicovery date | occurs in | has wavelength | has antonym |
|---|---|---|---|---|---|---|
| H alpha | Joseph Fraunhofer | 3 | 1814 | Sun | 6563 Å | emission line |
| H beta | Joseph Fraunhofer | 4 | 1814 | Sun | 4861 Å | emission line |
| H delta | 6 | 4101 Å | ||||
| H gamma | 5 | 4342 Å |
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