Today, with the development of electrification, household appliances such as mobile phones, walkie-talkies, televisions, computers, electric blankets, microwave ovens, etc., which are closely related to people's daily lives, have entered thousands of households, bringing great convenience to people's study and life. However, in the process of using household appliances and electronic devices, electromagnetic waves of different wavelengths and frequencies are generated to varying degrees. These electromagnetic waves are colorless, odorless, invisible, intangible, penetrating, and full of space, making it impossible to prevent and become a A new source of pollution, electromagnetic radiation has become one of the sources of harm to human health today. The investigation showed that in the electromagnetic field of 2 milligauss or more, the population suffering from leukemia was 2.93 times normal, and the muscle tumor was 3.26 times normal. Pregnant women should especially avoid exposure to electromagnetic radiation during the first trimester of pregnancy. Because when the embryo is in the mother, the toxic effects on harmful factors are more sensitive than those in adults, and after electromagnetic radiation, it will have adverse effects. If it is in the embryonic stage, it will cause abortion if it is exposed to electromagnetic radiation. If it is in the development of the fetus, it may damage the central nervous system if it is exposed to radiation, resulting in low mental retardation.
Electromagnetic radiation damage to the human body Electromagnetic radiation harms the human body mainly by thermal effects, non-thermal effects and accumulation effects. Thermal effect: More than 70% of the human body is water. Water molecules are rubbed against each other by electromagnetic waves, causing the body to heat up, thus affecting the normal work of other organs in the body. Non-thermal effect: There are weak electromagnetic fields in the organs and tissues of the human body. They are stable and orderly. Once they are disturbed by external electromagnetic waves, the weak electromagnetic field in equilibrium will be destroyed, and the normal circulation function of the human body will be destroyed. Cumulative effect: After the thermal effect and the non-thermal effect are applied to the human body, if the damage to the human body has not been able to be irradiated by electromagnetic waves before self-repair, the degree of damage will accumulate, and it will become permanent morbid or life-threatening for a long time. For groups that have been exposed to electromagnetic radiation for a long time, even if the power is small and the frequency is very low, it will induce unexpected lesions and should be vigilant! After long-term research, scientists from all over the world have shown that long-term exposure to electromagnetic radiation can cause decreased immunity, metabolic disorders, memory loss, premature aging, arrhythmia, decreased vision, decreased hearing, abnormal blood pressure, skin plaque, roughness, and even various types. Cancer, etc.; male and female reproductive capacity decline, women are susceptible to menstrual disorders, miscarriage, teratogenic diseases. However, for the time being, no large-scale data statistics have confirmed that there are inevitable links between foods with anti-electromagnetic radiation hazards: green tea, kelp, seaweed, wakame, Va, Vc, Vb1. lecithin, pig blood, milk, Animal-quality protein such as turtles and crabs.
for exampleGive a few things that are common in life and let the subject think for himself.
Light is the same as electromagnetic waves used in wireless communications. It is also an electromagnetic wave. The only difference is the wavelength of the two.
As I mentioned in my spit, the sun emits 360 degrees of dead light and high power visible light and other invisible electromagnetic waves. If I say to put a person in the sun, or put it in a very close place, then this person must hang. But humans on Earth have nothing to do on a sunny day. So we come to the first conclusion that regardless of the power of the source, the intensity of the electromagnetic wave will decay with distance. Therefore, the farther the mobile phone is from the base station, the worse the signal is.
one. Everyone accepts the radiation of visible light every day, affecting human health... Well, there should be no. Here, answer the question 2: The LED emits electromagnetic waves in the visible range (should be accompanied by a small amount of ultraviolet and infrared rays). The possible effects on the human body are the same as those of the sun, which is many times weaker than sunlight and can be ignored.
two. There are two kinds of electromagnetic waves close to visible light: ultraviolet rays near the wavelength of blue light, and infrared rays near the wavelength of red light. Infrared rays have a thermal effect. Ultraviolet rays can be sterilized and sterilized. When the human body receives radiation, the skin will become dark. If it is exposed for a long time, it will burn the skin. Excessive irradiation may cause skin cancer.
three. The wireless communication electromagnetic waves that are worried about human health that are worried by many people are high-frequency short-wavelength electromagnetic waves. However, such wavelengths are not as long as infrared rays. In winter, people who use hundreds of watts of infrared heaters at home do not feel dangerous about heating themselves. Why does this mobile phone router with less than 1 watt of power feel harmful to health? (Thank you @陈炳指æ£ç”µç£æ³¢è°±). For example, the microwave oven uses 915MHz or 2450MHz. SLOW! These two frequencies look familiar! The former is close to the frequency of GSM 900, which is really the frequency of home wifi 2.4GHz. (The above data comes from Interactive Encyclopedia and Wikipedia) Is there a panic? The frequency of microwave oven use is the same as the frequency of wifi and mobile phone! In theory, the electromagnetic waves of mobile phones and wifi will have a heating effect on the human body. But microwave ovens and mobile routers have the following differences:
Mobile phones and routers are open-type electromagnetic waves. Only a small part of their transmission power is absorbed by the human body. If all is absorbed by the human body, then do not communicate. The microwave oven concentrates electromagnetic waves in a closed space, and the transmission power is completely absorbed by the food.
The power of the microwave oven is generally less than 1000w. I have to thaw a pound of meat for a few minutes. The transmission power of the mobile phone is GSM average 0.1-0.25w, and CDMA average 0.1-1w. Wireless routers in China are more stringent, with a maximum of 10mW. That is to say, only 1/10 of the mobile phone, one hundred thousandth of the microwave oven. Even if all of this power is used to heat the human body, it should not be able to withstand the heat that you fan away with a few fans - so we can draw a conclusion: open the air conditioner / electric fan using wifi / mobile phone, can reduce the radiation on the human body The damage brought!
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