1, wavelength range: infrared wavelength range of 0.75 to 1000 microns, and far infrared is the longest wavelength in the infrared, the wavelength of infrared in the 5-15 microns is called far infrared.
2, physical properties: far-infrared is a kind of electromagnetic wave, is invisible light, but has all the characteristics of visible light, far-infrared rays of the main physical properties include emission, permeability and absorption, *** vibration.
3, application areas: infrared rays are widely used in military, medical, scientific research and other fields, such as night vision, infrared camera, infrared thermometer, etc., while the far infrared rays are mainly used in health care, food processing, agriculture, construction and other industries, such as the far-infrared sauna, far-infrared physical therapy equipment.
4, infrared is a kind of electromagnetic wave, located outside the red end of the visible spectrum, its wavelength is greater than the wavelength of visible light, infrared in the electromagnetic spectrum occupies from 760 nanometers (nm) extends to 1 millimeter (mm) range.