1. The spectra of emission by microwave spectroscopy or by far infrared spectroscopy. 2. However, I recently read in that " Far infrared waves are thermal. 3. Terahertz radiation is a region of the spectrum between far infrared and microwaves. 4. The metal plasma arc produces tremendous amounts of light energy from far infrared to ultraviolet. 5. Far infrared emitters ( FIR ) are typically used in the so-called low-temperature far infrared saunas. 6. Far infrared emitters ( FIR ) are typically used in the so-called low-temperature far infrared saunas.7. It was called far infrared , or forward-looking infrared. 8. In 2006, a far infrared bow shock was detected near the The bow shock around R Hydrae 9. Our vision has a certain acuity, fails to pick up far infrared or ( usually ) ultraviolet. 10. The dust temperatures derived from far infrared fluxes are warm relative to spirals, ranging from 40 90 K.