Lead : When people talk about radiation, they naturally think of harm, and even talk about "radiation". In fact, in normal life, we are exposed to a variety of radiation every day, including electromagnetic radiation, thermal radiation and solar radiation. Among them, electromagnetic radiation is closely related to people's lives. So what is the extent of the harm of our home appliances to our human body? Is it serious harm to health? See what experts think?
Household appliances, knowledge, home appliances, radiation, little harm to the human body
Division of low frequency and high frequency radiation
Electromagnetic radiation can be divided into low frequency electromagnetic radiation and high frequency electromagnetic radiation according to different radiation frequencies. It is understood that the frequency of low-frequency electromagnetic radiation is below several hundred KHz. Generally, we use V/m as the unit to describe the low-frequency electric field, and μt (micro-tesla) as the unit to describe the low-frequency magnetic field; the frequency of high-frequency electromagnetic radiation Above MHz, up to GHz or even higher. At this time, we generally use W/m2 (Watts per square meter) to describe the radiation intensity. The radiation leaked from mobile phones, WIFIs and microwave ovens is high-frequency radiation, while the radiation generated by home appliances such as induction cookers, razors, hair dryers, computers, televisions, and air conditioners is low-frequency radiation.
The main harm of radiation to the human body
According to Shen Qingfei, an engineer at the China Institute of Metrology, the current impact of high-frequency radiation on the human body mainly considers the thermal effects of absorption by the human body, which may lead to disorder of the human body. Secondly, some studies have shown that high-frequency radiation can disturb the central nervous system, causing headaches, dizziness, memory loss, insomnia, etc. High-frequency radiation can also affect men's semen, so that sperm quality is reduced, resulting in increased risk of infertility . Low-frequency radiation mainly considers the low-frequency magnetic field to generate eddy currents in the human body and thus affect the health of the human body.
The harm of radiation to the human body is mainly related to the intensity of radiation, the distance between the human body and the radiation source, and the time the human body is in contact with the radiation source.
Some epidemiological statistics show that home appliance radiation is associated with brain cancer and childhood leukemia. But whether these are really caused by radiation, science is still inconclusive. However, according to Shen Qingfei, an engineer at the China Institute of Metrology, the current home appliance radiation is rarely harmful to the human body. As long as the products you purchase are in line with national standards, and you are using them in accordance with normal methods, the harmful effects of home appliances are basically Can be ignored.
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