Due to the vibration of biological cells, far-infrared heat energy can be transmitted to the deeper layer of human skin, and the temperature below the deep layer rises, and the generated warmth is emitted from the inside out.
The intensity of this effect can dilate capillaries, promote blood circulation, strengthen metabolism among tissues, increase the regeneration ability of tissues, improve the immune ability of the body, and adjust the abnormal excitement of the spirit, thus playing a role in medical care.
There are countless far-infrared radiation sources in nature: cosmic stars and the sun; The oceans, mountains, rocks, soil, forests, cities, villages and various articles produced by human beings on the earth will emit infrared rays in different degrees in all environments above absolute zero (-273. 15℃). Modern physics calls it thermal rays.
According to the law of conservation of energy, the total energy of the universe will not increase or decrease, only the way of energy can be changed. Thermal energy is a kind of cosmic energy, which can be converted by radiation, conduction and convection.
In the process of radiation, some heat energy forms infrared rays. Infrared radiation speed is the same as visible light, and it can go straight like light; If a reflector is used, its conduction direction can be changed.
Decades ago, space scientists investigated the living conditions of human beings in spaceships under the conditions of vacuum, weightlessness, ultra-low temperature and overload, and learned that far infrared rays with a wavelength of 6000~ 15000 nm in sunlight are a necessary factor for biological survival. Therefore, people call this wavelength of far-infrared light "life light wave".
The wavelength of this kind of light is similar to that of far infrared rays emitted by human body, which can produce the most effective "* * * vibration" with water molecules in cells of organisms, and at the same time has permeability, which effectively promotes the growth of animals and plants.
Baidu encyclopedia-far infrared ray