In ordinary environments, electromagnetic waves (the energy level of electromagnetic waves does not exceed the limit of the corresponding frequency) will not cause harm to our health, but long-term exposure to high-energy electromagnetic waves (the energy level of the electromagnetic wave exceeds the limit of the corresponding frequency) value) environment will cause damage to our health.
Electromagnetic wave pollution, also known as electromagnetic pollution or radio frequency radiation pollution. It is characterized by the force of the electromagnetic field and is closely related to factors such as the properties, power, density and frequency of electromagnetic waves.
Due to the widespread application of electronic technology and the rapid development and popularization of radio broadcasting, mobile phones, television and microwave technology, the power of radio frequency equipment has doubled, and the electromagnetic radiation on the ground has increased significantly. It has reached a level that can directly threaten human health.
Extended information:
To detect whether electrical products emit radiation or electromagnetic waves, you can also adopt a simpler method, which is to use a household, small-sized radio that can receive AM (amplitude modulation) channels. , after turning it on, adjust the channel to a place where there is no broadcast, and close to the TV, refrigerator, microwave oven or computer and other household appliances to be measured.
If you find that the noise from the radio suddenly becomes louder, it means that there is strong electromagnetic radiation around the electrical appliance. After walking a certain distance, the noise will return to its original smaller noise level; in this way, the "safe" distance can be measured.
Different electrical appliances also have different precautions. For example, after using a computer, it is best to just turn off the screen and not turn it off. Change the computer screen to an LCD screen; when answering a mobile phone, it is best not to put the mobile phone on your waist. Occasionally or in the pocket of pants, it should be held in hand or placed fifty centimeters away from the human body; when buying a house, it should be far away from substation equipment and base stations.
Baidu Encyclopedia - Electromagnetic Waves