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| abstraction > hypothesis > theory > law > quantum law > Kirchhoff's law > Kirchhoff's second law | 
| Kirchhoff's second law comparison table | |||
| Subject | is an instance of | is a kind of | has definition | 
|---|---|---|---|
| Kirchhoff's law | quantum law | (1) To each chemical species there corresponds a characteristic spectrum. (2) Every element is capable of absorbing the radiation which it is able to emit; this is the phenomenon of the reversal of the lines. | |
| Kirchhoff's second law | Kirchhoff's law | Every element is capable of absorbing the radiation which it is able to emit; this is the phenomenon of the reversal of the lines. | 
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