wood burning hot tub.What is the infrared in a far-infrared sauna room?

　　Infrared was discovered by British astronomer William Herschel in an experiment in 1800, and this discovery was also confirmed by German scientist Harrison in the same year. In the experiment, it was found that there is a magical light outside the red light in the solar spectrum. People cannot see it with the naked eye, but they can feel obvious thermal radiation. Scientists call this radiation infrared radiation, and later people used to call it infrared or infrared light.

　　Infrared is an electromagnetic wave that accounts for 80% of the solar radiation energy. So far, electromagnetic waves collectively referred to as infrared are divided into three types: near-infrared, mid infrared, and far-infrared. The solar radiation includes γ All wavelengths of electromagnetic waves, including X-rays, are considered far-infrared, but only electromagnetic waves with wavelengths between 4-1000 micrometers are considered far-infrared. If converted by temperature, it is equivalent to 450 ℃ to minus 270 ℃, which means that the electromagnetic waves emitted by lower temperature radiation are far infrared.

　　Far infrared has strong penetration and radiation, significant temperature control and resonance effects, and is easily absorbed by objects and converted into their internal energy. After being absorbed by the human body, far-infrared radiation can cause resonance of water molecules in the body, activate water molecules, enhance their intermolecular binding force, and activate biological macromolecules such as proteins, putting the biological cells at a high vibrational energy level. Due to the resonance effect generated by biological cells, far-infrared thermal energy can be transferred to deeper parts of the human subcutaneous tissue, causing the temperature below to rise and the resulting warmth to dissipate from the inside out. This intensity of action expands capillaries, promotes blood circulation, strengthens metabolism between tissues, increases tissue regeneration ability, enhances the body's immune system, regulates abnormal mental states, and thus plays a role in healthcare.

　　The core of far-infrared radiation is that its wavelength (4-1000 microns) overlaps with the wavelength emitted by the human body (the average body temperature is 36.5 ℃, which is approximately 9.36 microns in wavelength), and the frequency range is within the same range. Therefore, it can activate cells and molecules in the human body, and this phenomenon is called resonance. It can activate cells, promote blood circulation, accelerate metabolism, and enhance the body's own immune system.

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