Which electrical appliances in our daily life contain radiation?

The unit of electromagnetic radiation: The unit of the power frequency band is μT. If the radiation is above 0.4μT, it is considered strong radiation, which is harmful to the human body. Long-term exposure is prone to leukemia.

If the radiation is below 0.4μT, it is relatively safe. The unit of radio frequency electromagnetic wave is μW/cm2. We divide the products involved in radiation in our lives into different levels. One ★ is a safe value, three ★ is in the excessive range, and five ★ or more is seriously excessive.

Television ★★★ When it comes to home appliance radiation, the first thing that comes to mind is the television that we watch every day. The radiation from the television is not just incredible, it is really incredible.

The radiation value of a TV set when it is being watched normally is 0.30μT, when changing channels it is 0.27μT, and in standby mode it is 0.11μT. When the side is being watched normally, the radiation value is 0.28μT, which is close to the warning value overall. The radiation intensity behind the TV set is very strong, and after turning on the TV, the radiation value is as high as 4.8μT within half a meter. Therefore, the most important thing to protect against TV radiation is to have the back of the TV facing the wall. Of course, the TV with the lowest radiation is the LCD screen. If your family is not ready to buy an LCD TV, you might as well buy potted flowers and place them around the TV.

LCD monitor★ This thing not only has a clear picture, but also has low radiation, which can ensure the health of you and your family. 0.11μT at 0.5 meters in front of the display, 0.12μT at the moment of power on, 0.11μT at power off, and 0.12μT at 0.5 meters to the side of the display, which seems to be quite reassuring.

Laptop★ Many people think that all computers have radiation, but this is not true. 0.1m in front of the laptop screen is 0.13μT, 0.3m in front of the screen is 0.10μT, 0.3m to the side of the screen is 0.13μT, 0.19μT above the keyboard, and 0.22μT for the power adapter. The test results show that the laptop itself does not radiate much, but the keyboard and mouse still have some radiation. Therefore, regular cleaning is very necessary, which can reduce the radiation of the keyboard to a certain extent.

Desktop computer host ★★★ Unlike laptops, the radiation of desktop computer host is quite strong. According to the measurement, the front is 0.17μT, but the radiation in the center of the host operation panel is slightly stronger, 0.26μT at a distance of 0.03 meters; 0.29μT on the side of the host, 0.23μT at the center of the left side of the chassis, 0.03 meters away, and 0.46μT at the back. But we usually have a certain distance from the back of the host, so it has little impact. In addition, the power-on moment and standby state are both 0.17μT. In addition, if the power wiring of the desktop computer is connected, the radiation is 0.47μT, so you should also keep a distance when using a desktop computer.

Subwoofer speaker ★★★★ Don't focus all your attention on radiation protection on computers, TVs and other products. The invisible killer No. 1 around you has appeared! The test of the subwoofer is really not optimistic. The subwoofer speaker, the center of the operation panel, 0.03 meters away is 0.63μT; the center of the right side of the speaker, 0.03 meters away is 5.68μT, the radiation is really not small. So what is its safe distance? After careful testing, it was found that when the distance is 0.4 meters, its radiation is reduced to 0.17μT. Therefore, the subwoofer speaker should be kept at least half a meter away when used. DJs who play music should wear radiation protection clothing.

Humidifier ★★★★★ Everyone should be highly nervous, because the invisible killer No. 2 in your life is here. This is the humidifier you don't know. Among them, the fan humidifier has the highest radiation. The result of testing it close to it is 49μT, 15μT when used at low speed, and 32μT when used at high speed. However, it is reduced to 0.52μT at a distance of 1 meter. The result of testing the ultrasonic spray humidifier close to it is 9μT, and 0.22μT at a distance of 1 meter. The result of testing the air purifier close to it is 0.35μT, and it is reduced to 0.12μT within a range of 0.5m. So don't get too close to the humidifier when using it, especially keep children away.

Microwave oven ★★★★★★★ The number one killer is definitely the microwave oven. We tested the microwave ovens that everyone is most concerned about and found that the radiation is greatest at the gap of the microwave oven door. At medium power: 17.32μW/㎝2 at 0.03 meters in front of the door gap, 2.01μW/㎝2 at 0.3 meters in front of the door gap, 0.41μW/㎝2 at 1 meter in front of the door gap, and 30.14μW/㎝2 at the center of the microwave oven door, 0.05 meters from the door.

The data is a bit complicated, but there is no doubt that the radiation is the highest when the microwave is turned on, so it is recommended that you never get too close to the microwave when cooking. Experts recommend that after using the microwave, it is best to wait one to two minutes before opening the microwave door to take out the food.

Radiation distance of non-directional radiation source

In a uniform electromagnetic medium with a non-directional radiation source, the radiation induction intensity is inversely proportional to the 2-3 power of the distance when the radiation source intensity is fixed.

The difference between a distance of 10 cm and a distance of 1 meter is 100-1000 times