Gao You, a professor at the China Branch of the Electromagnetic Noise and Interference Committee of the International Radio Science Union, said that WiFi is actually a small local area network with a transmitter-a wireless router, which generates electromagnetic radiation around it. The working power of ordinary wireless routers is mostly between 30 and 500 MW, which is lower than that of ordinary mobile phones (about 125 MW ~2 W). The World Health Organization pointed out that there is no evidence that mobile phone radiation will have a negative impact. Generally speaking, a 20-minute telephone call absorbs more radiation than a wireless router that has been used for one year. It can be seen that WiFi radiation has little impact on health.
Need to be reminded that if WiFi is used improperly, it may also cause harm to the human body. First of all, the amount of radiation received by the human body is related to frequency. The higher the frequency, the greater the damage. So there is no need to use a wireless router with excessive power at home. Secondly, radiation hazards are also related to distance. The greater the distance, the less harm. It was discovered by the industry in 20 12, and its power density at 1cm near the WiFi antenna was 9. 1 microwatt /cm2, which was lower than the 40 microwatt /cm2 stipulated in China. However, if there are pregnant women, children, the elderly or people with low immunity at home, please keep the wireless router at a distance of more than 1 meter from their activity range. Finally, it is best not to put WiFi devices in the bedroom, especially at the bedside; If you don't use WiFi, you'd better turn off the wireless router to reduce unnecessary risks.