Principle of electromagnetic radiation
One, electromagnetic radiation
Electromagnetic waves are a form of matter that exists from ancient times around us, such as: lightning, sunlight, heat and so on. Visible light, radio waves, ultraviolet, microwave, infrared, rays, etc. are electromagnetic waves. Visible light visible to the naked eye belongs to a very short section of electromagnetic waves.
Electromagnetic radiation is the electric and magnetic fields, the two interact with each other to form the fluctuations, to radiation transmitted to a distant place.
Two, electromagnetic radiation where
Electromagnetic radiation is all around us, such as high-voltage lines, radio, television, substations, radar stations, electromagnetic wave towers and medical equipment, electronic instruments, office automation equipment and microwave ovens, televisions, radios, computers and cell phones and other household appliances produce a variety of different wavelengths and frequencies of the electromagnetic wave work. Computer, cell phone, television, microwave ovens and other household appliances produced when using radiation, they are invisible, colorless and tasteless, but everywhere. Electromagnetic wave radiation floods our space, destroying the good electromagnetic wave ecological environment, and has become a new invisible killer in modern society. Modern people receive daily electromagnetic wave radiation intensity than a few hundred years ago, electromagnetic radiation 200 million times higher. At present, electromagnetic radiation has become the ecological environment of the fourth major source of pollution, the United Nations Conference on the Human Environment has been to prevent electromagnetic radiation pollution as one of the environmental protection projects.
What is the harm of electromagnetic radiation on the human body
Three, electromagnetic radiation on the human body what harm
1, electromagnetic radiation on the human body what harm to the body function
The human body in the acceptance of electromagnetic radiation, the body will make the body warming up, if a lot of absorbed radiant energy, relying on the regulation of body temperature can not be the heat emitted out of the words, then it will cause the temperature of the body to rise. Elevated, and then trigger a variety of symptoms, such as palpitations, insomnia, bradycardia, head swelling, decreased immune function, white blood cell reduction, vision loss. It can also cause serious harm to the human body, which may lead to malformation of babies or spontaneous abortion of pregnant women; affecting the immunity, circulatory system, reproductive and metabolic functions of the human body.
2, electromagnetic radiation on the human body what harm to the eyes
Electromagnetic radiation on the human as well as animal eye damage is a typical example of the role of microwave heat. The eye is a complex biological structure, mainly composed of the lens and vitreous humor, the presence of a large amount of water in the eye and a small amount of blood vasculature, its dielectric constant and conductivity is very high. That is, microwaves entering the eye attenuate rapidly, indicating that the eye has good absorption properties for microwaves. Electromagnetic radiation as a kind of energy transfer, will directly transfer energy to the atoms and molecules, so that their movement accelerated, and then in the body to form a thermal effect. When the microwave effect on the human eye, the eye lens more water, easy to absorb more energy, thereby damaging the waterproof cells of the eye, the lens without vascular components, the metabolic rate is reduced, it is difficult to damage or death of the cells absorbed, the accumulation of time in the lens to form a nucleus, which will lead to vision loss, cataracts and even blindness.
Electromagnetic radiation
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