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far infrared comparison table
Subject is a kind of has acronym has definition has source
infraredphotonIRThe region of the electromagnetic spectrum from a wavelength of about 1 μm (10-6 m) to about 200 μm. The region from 1 to 5 µm is the near infrared: 5-30 is the mid infrared and 30-200 µm is the far infrared. 
far infraredinfraredFIR atomic transitions, rotational transitions in molecules

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