What effect does radiation have on human body? Radiation is invisible and intangible. As long as it is an electrical appliance, it will produce electromagnetic waves and radiation without exception, which is a bit "long radiation, sparse but not leaking". So, what effect does radiation have on human body?
What effect does radiation have on human body? 1 Radiation hazards are described as follows:
1, promoting cell canceration, abnormal hormones, severe loss of calcium ions, dementia, abnormal pregnancy and abnormal production.
2. All objects in nature are constantly transferring heat in the form of electromagnetic waves as long as the temperature is above zero. This way of transmitting energy is called radiation. The energy released by an object through radiation is called radiant energy, or simply radiation.
According to the different effects of radiation on matter, people divide radiation into ionizing radiation and non-ionizing radiation. Ionizing radiation includes cosmic rays, X-rays and radiation of radioactive substances.
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Details of radiation
1, radiation refers to the transfer of energy in the form of waves or subatomic particle motion. Radiation energy radiates linearly in all directions from a radiation source.
2. Radiation and particles in the form of electromagnetic waves (such as alpha particles and beta particles). Radio waves and light waves are electromagnetic waves. Their propagation speed is very fast, and the propagation speed in vacuum is the same as that of light waves (3×10.8 m/s).
3. Visible light also belongs to radiation. Generally, it can be divided into ionizing radiation and non-ionizing radiation according to its energy level and the ability of ionizing substances. This term is usually used for ionizing radiation.
Ionizing radiation has enough energy to ionize atoms or molecules, but non-ionizing radiation does not. Radioactive substances refer to substances that can emit ionizing radiation. There are three main types of ionizing radiation: α, β and γ radiation (or rays).
What effect does radiation have on human body? What harm does electromagnetic radiation do to human body?
Generally, a small amount of electromagnetic radiation will not affect human health', but when the human body is exposed to radiation doses exceeding the safety for a long time, cells are likely to be killed or die in a large area.
According to foreign data, in 2 1 century, electromagnetic radiation has become one of the pathogenic sources that endanger human health. In the electromagnetic field, the incidence of leukemia is 2-93 times that of normal environment, and the incidence of muscle tumor is 3-26 times that of normal environment.
Most experts at home and abroad believe that electromagnetic radiation is one of the causes of childhood leukemia, which can induce the proliferation of human cancer cells, affect the human reproductive system, lead to mental retardation of children, affect the human cardiovascular system, and have adverse effects on the human visual system.
In addition, the World Health Organization also clearly pointed out that women who stay in the environment of more than 20 computers for a long time and frequently in the early pregnancy will increase the chance of spontaneous abortion; Not only that, if it is in the second and third trimester of pregnancy, it will also affect the development of the fetus, which will seriously lead to fetal malformation and intellectual disability.
What methods are there to prevent electromagnetic radiation?
1, away from electromagnetic radiation sources.
Radiation experts said: electromagnetic radiation can be divided into far field and near field. Generally, near-field electromagnetic radiation is harmful to human body, and far-field electromagnetic radiation usually has no effect, so staying away from electromagnetic radiation sources can effectively prevent radiation.
2, strengthen exercise at ordinary times
In addition, in a healthy state, the human body has certain resistance to electromagnetic radiation, and its ability to convert electromagnetic radiation into heat will be enhanced, so strengthening physical exercise can effectively prevent electromagnetic radiation.
Step 3 supplement anti-radiation food
The so-called radiation-resistant foods are actually daily foods such as fruits and vegetables that can strengthen the self-repair function of the human body. The combination of various kinds of meat and vegetables can adjust the state of the body and improve the radiation resistance of the human body.
Step 4 wear radiation protection clothing
Experts from China Consumers Association once said: At present, all major brands of radiation protection suits on the market have the function of preventing daily radiation. Pregnant mothers can use radiation protection suits to prevent radiation during pregnancy, which can not only prevent radiation, but also relieve the nervous mood of pregnant mothers, which is conducive to the baby's development and growth.
What effect does radiation have on human body? Everything has radiation.
According to the standard scientific definition, radiation refers to the phenomenon that part of the electromagnetic energy emitted by the field source is far away from the field source and then returns to the field source. Energy diffuses outward in the form of electromagnetic waves or particles (such as alpha particles and beta particles). All objects in nature always transmit energy in the form of electromagnetic waves and particles as long as the temperature is above absolute zero. This way of transmitting energy is called radiation.
Just because everything is made up of energy, everything has radiation, and radiation is the emission of energy. Everything is receiving radiation and radiating others, and exchanging energy. According to the definition, under this property, any object with a temperature higher than absolute zero can emit electromagnetic radiation. However, there is nothing in the world whose temperature is equal to or lower than absolute zero. Therefore, all objects around people are emitting electromagnetic radiation all the time.
Electromagnetic radiation can be divided into natural sources and artificial sources. Natural electromagnetic radiation comes from the earth's thermal radiation, solar thermal radiation, cosmic rays and static electricity, which is a natural phenomenon. Artificial electromagnetic radiation comes from a wide range of sources, not only from the operation of high-voltage lines, substations, radio stations, electronic instruments, medical equipment, laser photography equipment and office automation equipment, but also from the use of household appliances such as microwave ovens, televisions, computers, mobile phones, refrigerators, air conditioners, electric blankets and radios.
The impact on the human body depends on three factors.
The influence of electromagnetic radiation on human body is related to the following factors: the relative distance from the radiation source, the time length of "thermal effect" and the intensity of the radiation source. The influence of distance factor is the most obvious, and radiation is inversely proportional to the square of distance. When the distance increases by 10 times, the radiation will decrease by 100 times.
When the whole body dose of electromagnetic radiation reaches 4 watts per kilogram for 30 minutes, the temperature of human body will rise by 65438 0℃, which is the "thermal effect" of electromagnetic radiation on human body. "Thermal effect" may cause harm to human body. When the human body is at 4 1℃ for a long time, it will produce congestion reaction; When it is at 45℃ for a long time, metabolism will be blocked. Some human organs, such as eyes, head and male reproductive system, react more strongly to "thermal effect". If the male reproductive system is at a temperature of 30℃ for a long time, it will affect the life activities of the testis.
The intensity of the radiation source mainly depends on the current. The greater the current, the greater the radiation intensity of its magnetic field, and the greater the harm to human body.
To sum up, as long as the radiation dose does not reach a certain value, there is no need to worry too much. Quantitatively, the dose of ionizing radiation has a unit called millisieverts, 100 millisieverts, which is the harmful dose limit. Single ionizing radiation exceeding this value may have serious consequences; If it does not exceed this value, no clear symptoms can be observed. How much is 100 millisieverts? It is almost equivalent to the amount of radiation that you can achieve when you are irradiated by more than 80 X-ray machines at the same time. Do an X-ray, and the radiation is 1, 2 millisieverts. Every year, the inhaled radon, the ingested radioactive elements and the ionizing radiation accumulated by cosmic rays (collectively referred to as "natural radiation", that is, the ionizing radiation inevitably received in the natural state) are 2 or 4 millisieverts. Compared with the harmful dose limit of 100 millisieverts, such a small dose is far from enough to cause substantial harm to people. Therefore, we don't have to give up eating because of choking, because we are worried about that little radiation and don't go to the physical examination; Not to mention not worrying about anything, worrying about those tiny natural radiation.
Adults and children who are usually exposed to electromagnetic radiation can eat more rape, mustard, cabbage, radish and so on. The treatment of electromagnetic radiation injury is mainly anti-radiation drugs.