Infrared Radiation is a type of electromagnetic radiation that lies between visible light and microwave in a spectrum. This kind of IR wave is used in instruments such as infrared sauna, FTIR, etc. Every object with a temperature of at least -268 °C (-450 °C / 5 K) emits IR waves. For example, about 49% of energy from the sun comes to the earth in the form of IR waves. Thus, in conclusion, every object in this universe continuously emits this kind of radiation. Infrared Radiation Wavelength infrared radiation, IR wave From the table, we can know that based on the wavelength of the IR waves, they are of three types. They are near, mid, and far-infrared radiation. Infrared Radiation Examples The radiant heat is directly proportional to the wavelength of the infrared radiation. Thus, the far-infrared wave is hotter than the near-infrared wave. We can experience, far-infrared waves in the form of heat. The source of this radiation can be the sun, fire, radiator, etc. In the case of a near-infrared wave, you can not even feel the heat. For example, the IR LED that we use in remote control, falls into this category. Visit https://www.tec2med.com/infrared-radiation/ for more information