Do you know the amount of radiation from computers?
1. keyboard 1000 V/m
2. Mouse 450V/m
3. Screen 2 18V/m
4. Host170V/m
So, please be careful when you use the computer and enjoy surfing the Internet.
Electromagnetic radiation and health
CCTV International July 2003 15 14:52
The propagation process of electric field and magnetic field produces a force field, which is called electromagnetic field. This propagation process is called electromagnetic radiation. Such as mobile phones, telephones, transmission and distribution lines, etc. Everyone has current, and if there is current, there must be radiation problems. For example, computers, televisions, mobile phones and microwave ovens are all close to the human body, so the harm is even heavier. Although there is radiation, such as lights and high-voltage lines, it is far from the human body and the radiation is relatively small.
What are the common items with high radiation in life?
Including computers, televisions, microwave ovens, mobile phones, etc. The stronger the electromagnetic intensity emitted by the radiation source, the greater the harm to human body and the cumulative effect of electromagnetic radiation. Once or twice occasionally, you can't see anything wrong, but when it accumulates to a certain extent, it will slowly cause harm to the human body.
Three elements of electromagnetic radiation: 1, radiation source intensity; 2. Radiation exposure time; 3. Distance from radiation source
How does electromagnetic radiation affect the human body, thus causing harm to the human body?
The harm of electromagnetic radiation to human body is mainly a process of synchronous oscillation. For example, when I taught 100 students in the past, I asked them to turn left and right. If I shout slowly, the students may cooperate with me easily. If I shout many times a second, I will be out of sync and collide with each other. Wearing cotton-padded clothes for a long time in winter will take off because it will cause the oscillation of biological molecules and then produce thermal effects. It is generally believed that the influence of electromagnetic radiation on human body is mainly thermal effect and non-thermal effect. Electromagnetic radiation includes non-ionizing radiation and ionizing radiation. When ionizing radiation acts on biological molecules, the positive and negative charges of organic molecules can be pulled apart, which will lead to irreversible organic lesions. Non-ionizing radiation is generally radio emission, and its quantum carrying energy is too small to separate the positive and negative charges of molecules. When the external action field is removed or the field strength is low, it can be restored to organic molecules.
What harm does computer do to human body?
Computer radiation radiates from computer screen, mainframe, chassis and even mouse. Of course, the main radiation comes from the screen, so it is enough to prevent screen radiation at ordinary times. Computer radiation lasts for three minutes, including static electricity, radio frequency radiation and X-rays. Protective measures include 1, shortening one-time contact time, and using anti-radiation skin cream.
How to judge whether you have been harmed by electromagnetic radiation?
Usually, people exposed to electromagnetic radiation will feel headache, dizziness, insomnia, dreaminess, memory loss and other symptoms, and physical changes may also lead to hair loss and hair loss. Dry eyes usually lead to cataracts. There will be some changes in the blood picture, such as high and low blood pressure and sometimes high white blood cells. In addition, examination of ECG can also reveal the symptoms of palpitation and arrhythmia.
What effect does the electromagnetic radiation of desk lamp have on human body?
Nowadays, the eye protection lamps on the market actually change the frequency from 50 Hz to 50,000 Hz, and 50,000 Hz is a high-frequency oscillation. There must be high-frequency electromagnetic induction at high frequency. If it is detected by a high-frequency monitor, the high-frequency eye protection lamp will make a sound. If you look at this monitor, you can see the high-frequency coil intuitively. As long as there is a high-frequency electromagnetic field passing through the coil, it will be induced, and then the alarm can be implemented through the buzzer of the instrument.
How to protect
Active protection should be taken against electromagnetic radiation, and there are many ways to prevent electromagnetic radiation now. For example, add a special cover to the microwave oven, add a radiation screen to the computer, and wear some radiation-proof clothes. We can use the microwave oven to see the protective ability of the radiation-proof Chinese-style chest covering. The radiation of the microwave oven can be measured when the pregnant woman's anti-radiation belly pocket is not put, but the electromagnetic radiation hardly exists after the pregnant woman's anti-radiation suit is put.
Main points of radiation protection for pregnant women
1, away from radiation sources
2. Cut off the emission source in time.
3. Pregnant women wear radiation protection clothing
The ideal way is to cut off the radiation source. Pregnant women are likely to be affected by radiation when they go out, so personal protection is necessary, such as wearing personal protective clothing including radiation-proof Chinese-style chest covering, radiation-proof skirt and so on.
(Source: CCTV-The Road to Health)