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| physical object > natural object > particle > boson > carrier boson > photon > infrared | 
| infrared comparison table | ||
| Subject | has acronym | has source | 
|---|---|---|
| far infrared | FIR | atomic transitions, rotational transitions in molecules | 
| mid infrared | MIR | |
| near infrared | NIR | atomic transitions, vibrational transitions in molecules | 
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