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| abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > hydrogen line > Paschen line | 
| Paschen line comparison table | ||||||||||||
| Subject | has lower energy level | has specie | has equivalent width | has unit | has upper energy level | has value | occurs in | has series limit | has width | has wavelength | has transition | is an instance of | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pa alpha | 3 | hydrogen (H I) | radiation unit | 4 | 8204 Å | 18751 Å | Paschen line | 
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