Our body radiate some heat energy but is it radiate infrared? Or it does not radiate anything at all?
Hi
Has it ever occurred to you that your body is emitting radiation? Yes, all objects, including human bodies, emit electromagnetic radiation. The wavelength of radiation emitted depends on the temperature of the objects. Such radiation is sometimes called thermal radiation. Most of the radiation emitted by human body is in the infrared region, mainly at the wavelength of 12 micron. The wavelength of infrared radiation is between 0.75 to 1000 micron (1 micron = 10-6 metres). This wavelength is longer than that of red visible light so this explains the name 'infrared', meaning 'beyond the red'.
The amount of thermal radiation emitted by an object depends on its surface temperature, area and characteristics. Warmer object emits more thermal radiation than cooler one. Handheld infrared ear or forehead thermometers are used to probe body temperatures by detecting the infrared radiation emitted by human bodies. Infrared cameras are also used for fast screening of travelers with a fever at airports, ports and border crossings.
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