Radiation
Pinyin: fúshè
Explanation:
1. Stretching out in a straight line from the center in all directions.
2. The propagation of electromagnetic waves such as heat radiation, light, and radio waves is also called radiation.
When a monitor glows, the outer electrons of the phosphor screen are excited to emit x-rays.
Definition
All objects in nature, as long as the temperature in the absolute temperature above zero, are in the form of electromagnetic waves at all times and constantly transmit heat to the outside, this way of transmitting energy is called radiation. Objects through the radiation of the energy released, known as radiant energy. Radiation by roentgen/hour (R)
Radiation has an important characteristic, is that it is "reciprocal". Regardless of the temperature of the object (gas), it radiates outward, and object A can radiate to object B, while B can radiate to A. This is different from conduction, which is a form of radiation. This is different from conduction, which is unidirectional. Anyone who has been exposed to a large amount of radiation should rinse the entire body thoroughly with soap and plenty of water, and seek medical or expert help immediately! (The picture is "radioactive material danger, beware of radiation" warning signs)
Radiation energy is absorbed by the object when the thermal effect occurs, the object absorbs different radiation energy, radiation produced by the temperature is also different. Therefore, radiation is an important way to convert energy into heat. Radiant heat transfer (radiant heat transfer) rely on electromagnetic radiation to realize the process of heat transfer between hot and cold objects, is a kind of non-contact heat transfer, can also be carried out in a vacuum. Electromagnetic waves emitted by the object, theoretically, is distributed throughout the spectral range, but in the temperature range encountered in industry, the practical significance of the wavelength is located between 0.38 ~ 1000μm thermal radiation, and most of them are located in the infrared (also known as heat rays) in the region of 0.76 ~ 20μm range. The so-called infrared heating, is the use of this section of thermal radiation. The study of the law of thermal radiation, for the reasonable design of the furnace heat transfer is very important, for high temperature furnace operator labor protection also has positive significance. When a system needs insulation, even if the temperature of this system is not high, the impact of radiation heat transfer can not be ignored. Such as silver-plated thermos bottle guts, is to reduce the heat loss caused by radiation heat transfer. The basic concept of thermal radiation any object in the emission of radiant energy at the same time, but also constantly absorbing the radiant energy sent by the surrounding objects. The difference between the energy radiated by an object and the energy absorbed is the net energy it transfers out. The radiative capacity of an object (i.e., the amount of energy radiated per unit of time per unit of surface) increases rapidly with increasing temperature. Generally speaking, when an object is subjected to other objects thrown radiation (energy Q), which is absorbed into the thermal energy of the part of the QA, is reflected part of the QR, through the object of the part of the QD, it is clear that these parts of the total energy and the relationship shown in the following formula: QA + QR + QD = Q If A = QA / Q is called the rate of absorption, R = QR / Q is called the rate of reflection, D = QD / Q is called the penetration rate, then there are: A + R + D = 1 radiation
If the object A = 1, R = D = 0, that is, the energy of thermal radiation reaching the surface of the object is completely absorbed, the object is called an absolute black body, referred to as a black body. If R = 1, A = D = 0, that is, to reach the surface of the object of the thermal radiation of the energy is reflected; when this reflection is regular, this object is called a mirror body; if it is a chaotic reflection, it is called an absolute white body. If D = 1, A = R = 0, i.e., all the energy of the thermal radiation reaching the surface of the object is transmitted through the object, the object is called a heat-transmitting body. In fact, there is no absolute black body and absolute white body, only some objects close to the absolute black body or absolute white body. For example: no glossy black paint surface close to the black body, the absorption rate of 0.97 ~ 0.98; polished copper surface close to the white body, the reflectivity of up to 0.97. Affect the absorption and reflection of solid surfaces of the nature of the surface, mainly the surface condition and color, the surface condition of the impact is often greater than the color. Solids and liquids are generally impervious to heat. Thermal radiation energy through the surface of the solid or liquid after only a short distance (generally less than 1mm, through the metal surface after only 1μm), it is completely absorbed. Gases have little or no ability to reflect thermal radiation, monoatomic and symmetric diatomic gases (such as Ar, He, H2, N2, O2, etc.) at general temperatures can be regarded as heat-transparent, and polyatomic gases (such as CO2, H2O, SO2, NH3, CH4, etc.) have a considerable absorptive capacity in a specific wavelength range.
Radiation is dispersed outward in the form of electromagnetic waves and particles (e.g., alpha particles, beta particles, etc.). Radio waves and light waves are electromagnetic waves. They travel very fast, the same speed as light waves (3 x 1010 cm/sec) in a vacuum and slightly slower in air.
Electromagnetic waves are synthetic waves composed of waves of different wavelengths. Its wavelength ranges from cosmic rays of 10E-10 microns (1 micron = 10E-4 cm) to radio waves with wavelengths up to several kilometers.Υ rays, X-rays, ultraviolet, visible light, infrared, ultra-shortwave and long-wave radio waves all belong to the range of electromagnetic waves. What is visible to the naked eye is a very short section of electromagnetic waves, from 0.4-0.76 micrometers this part is called visible light. Visible light by the prism after spectroscopy, become a band of red, orange, yellow, green, cyan, blue, purple seven colors, which is called the light band spectrum. The longest wavelength of red light, violet wavelength is the shortest, the wavelength of the other colors of light is in between. Wavelength longer than red light (& gt; 0.76 microns) have infrared radio waves; wavelength shorter than the violet light (& lt; 0.4 microns) have ultraviolet, Υ rays, X-rays and so on. Although these radiations are invisible to the naked eye, they can be measured by instruments.
The wavelength of solar radiation is mainly 0.15-4 microns, of which the maximum wavelength of radiation is 0.5 microns on average; the wavelength of terrestrial and atmospheric radiation is mainly 3-120 microns, of which the maximum wavelength of radiation is 10 microns on average. It is customary to refer to the former as short-wave radiation and the latter as long-wave radiation. [edit]Harm People who work, study and live in an environment where radiation sources are concentrated are prone to insomnia, memory loss, physical weakness, low immunity, etc., and their cancer cells grow twenty-four times faster than those of normal people.
How far is radiation from us In our living environment, radiation is everywhere!
Household appliances: television, refrigerator, air conditioning, microwave ovens, vacuum cleaners, etc.
Office equipment: cell phones, computers, photocopiers, electronic instruments, medical equipment, etc.
Home decoration: marble, laminate flooring, wallpaper, paint, etc.
Surrounding environment: high-voltage lines, power substations, television (radio) signal transmission towers,
Natural environment: sunspots, etc.
A healthy person can withstand a short 5000R load, but only 700R dose are enough to make a healthy person fatal threat, but each person's body resistance is different, and each person will have different degrees of symptoms. Generally exposure to electromagnetic radiation pollution can cause headaches, insomnia, heart rate irregularities and other central nervous system problems. At the same time, for some people's eyes may have an impact, vision loss, skin diseases and other phenomena, heavy and may cause cancer. For pregnant women, it may lead to miscarriage, and elderly people with cardiac pacemakers should be especially careful. At the same time, different people or the same person at different ages on the tolerance of electromagnetic radiation is not the same, even in the excessive environment, does not mean that all people will get sick, so there is no need to electromagnetic radiation "grass". However, the elderly, children, pregnant women or patients with pacemakers, electromagnetic radiation-sensitive people and long-term in the excessive dose of electromagnetic radiation in the environment should take precautions. [Edit Paragraph] Prevention With the rapid development of science and technology, a variety of scientific and technological products, household appliances into people's lives, all of which have greatly improved people's work efficiency, improve people's lives, do not dare to imagine, if there is no such charged equipment people's lives will be how? However, with the city around the high-voltage electricity, transmission towers are getting higher and higher, more and more electrical equipment at home, people feel the convenience at the same time, but also in the harm. Electromagnetic radiation pollution has become the fourth largest environmental pollution after water, air and noise. If one day, you live in the house was suddenly told in the more serious electromagnetic radiation, how would you? Can you find out which of the many household appliances have higher levels of radiation? What is electromagnetic radiation? Professionally speaking, electromagnetic radiation is the phenomenon of energy traveling through space in the form of electromagnetic waves. Almost any electrical appliance in our home generates electromagnetic radiation. For example, microwave ovens, televisions, computers, cell phones and so on! Radiation
Protective clothing: including outerwear, vests, aprons, maternity clothes, etc., made of special fibers, has a better anti-electromagnetic radiation, anti-static effect. Especially families with microwave ovens, it is best to equip with protective aprons, which can effectively prevent electromagnetic radiation. For pregnant women if contact with electrical equipment, be sure to wear protective bibs or protective clothing to ensure the healthy growth of the fetus.
Anti-radiation screen: anti-radiation, anti-static, anti-glare and many other effects on the protection of eyesight also have a certain effect.
Another way is to pay attention to the time and distance or eye drops.
The degree of damage is directly proportional to the time, that is to say, the longer the exposure to electromagnetic radiation, the greater the damage. And inversely proportional to the distance, the distance is ten times greater, the radiation received is one percent of the original, the distance is one hundred times greater, the radiation received is one ten thousandth. [edit]Q&A A:The difference between electromagnetic radiation and electromagnetic radiation pollution?
Q:In fact, electromagnetic radiation and electromagnetic radiation pollution are two concepts, any charged body has electromagnetic radiation, when the intensity of electromagnetic radiation exceeds the national standard, it will produce negative effects, causing different lesions and harm to the human body, this part of the more than the standard electromagnetic field strength of radiation called electromagnetic radiation pollution.
A:What is the effect of cell phone base station radiation on human body?
Q:It is a relatively common phenomenon that cell phone base stations are installed on many residential buildings in the city. Some citizens are worried about whether the electromagnetic radiation produced by such a device will be harmful to the human body. In fact, there is no need for people to worry about this issue. The difference between cell phone radiation and cell phone base station radiation. Generally a cell phone has an electromagnetic radiation value between 0.03-0.7, while a cell phone base station has a radiation value of 10 microwatts. The value of radiation produced by a cell phone base station is not much higher than the value of a cell phone! In addition, electromagnetic radiation is the closer the distance, the longer the radiation exposure, the deeper the damage suffered! The cell phone base stations installed on the roofs of our residential buildings are at a safe distance from us, so we can rest assured! [Edit paragraph] specific electrical equipment at home to protect points Electrical Radiation Index
Electrical radiation index of the implementation of the five-point system, where it is rated as five points, are serious exceeds the standard, can cause you to pay attention to; more than three stars also belongs to the scope of the exceeding the standard, but also to cause you attention; a star, is safe, you can rest assured that the use of.
Electromagnetic radiation is divided into two levels, including the frequency band of the unit is μT, if the radiation in the 0.4 μT or more belongs to the stronger radiation, the human body has a certain degree of harm, long-term exposure to susceptible to leukemia. If the radiation is below 0.4μT, it is relatively safe. The unit of RF electromagnetic wave is μW/㎝2.
1.TV
Traditional CRT TV is the first to be tested. We first tested it in close proximity. Within half a meter from the front, the radiation value it produced was 0.12μT at the moment of normal power-on, 0.30μT during normal viewing, 0.27μT when changing channels, and 0.11μT in standby mode, and 0.28μT on the side during normal viewing, which overall appeared to be close to the warning value.
Because most people watch TV at a distance of about 3 meters, we also did a test at 3 meters on the front side, and found that there is a large degree of attenuation of radiation: switching on and off, normal viewing, changing channels, and standby status are all 0.12μT, the test results show that the traditional tube TV will not be harmful to normal viewing. But to our surprise, it is in the back of the greater intensity of radiation, power on within half a meter of the radiation value of 4.8 μT, and across the glass, wood, radiation has not been reduced, and even across the 10-centimeter-thick wall radiation value of 0.9 μT. If your TV behind the head of the bedroom bed can be careful. But people usually rest and watch TV at different times, so it's not a big problem.
Then look at the plasma TV, front half a meter, power on, watch, change the channel are 0.11μT, standby 0.12μT, side 0.11μT; in the front of the 3 meters, power on 0.12μT, normal viewing is 0.14μT, change the channel, standby 0.11μT, from the results of the test compared to the traditional TV, the intensity of radiation of the plasma to be a little smaller.
And rear-projection TV, normal viewing, close to the front of the body 0.12μT, side 0.19μT, behind 0.14μT; front half a meter at 0.11μT; front 3 meters at 0.1μT.
In the TV series is the most reassuring is the LCD TV, whether it is the front of the front half a meter or the front of the 3-meter range, the moment of the power on, normal viewing, change the station, The test results for the standby state were all 0.1μT, while the side was only 0.11μT, essentially no change in radiation intensity.
Test results: after comparing the three kinds of TVs, it is easy to find that LCD TVs, rear-projection TVs radiation is the smallest, plasma TVs radiation is slightly stronger, CRT TVs are larger, but mainly in the back of the TV, suggesting that it is best to maintain a certain distance when you watch, especially children.
2. DVD player and home theater
These years the popular home theater, that is, the DVD player plus sound system, close to the results of the test, the DVD 1.2μT, OK machine 1.2μT, amplifier 1.24μT, 1.5μT small speakers, large speakers 0.49μT, if the same time to turn on the radiation can be not small.
Tips: We recommend that you use the home theater as little as possible, if you want to sing the best or go to the KTV.
CRT monitors, LCD monitors, desktop computers, small speakers, laptops
People have always thought that CRT monitors are more radioactive, in the end, it is not what we think it is? We first tested it, the front of the display is close to 1.00μT, the side of the display is close to 0.55μT, which is not small ah! In the look at the center of the display, the distance of 0.03 meters, the radiation is still 0.55μT, is this CRT display is really as big as we think the radiation? In order to further confirm, we began to look for its safe distance, the results found that the distance of 0.2 meters, in front of the display of radiation attenuation to 0.18μT, it seems that CRT monitors as long as to maintain a distance of 0.2 meters can be used without fear. Some viewers asked if it is the same as CRT TV behind the larger radiation, the test found that it is not large. Some people like to use anti-radiation screen saver, does it work? We also made a special test of it, plus the screen protector radiation only 10% reduction, it seems that the role of the screen protector is not big.
CRT monitor radiation index: ★★★★★☆☆
Today's LCD monitors are replacing traditional monitors, and we also tested it. 0.11μT at 0.5 meters in front of the display, 0.12μT at the moment of power-on, 0.11μT at power-off, 0.12μT at 0.5 meters to the side of the display, it seems that LCD monitors are really quite reassuring.
LCD radiation index: ★ ☆☆☆☆
Let's take another look at the host of the desktop computer, the front 0.17μT, but the host of the central operating panel radiation is slightly stronger, the distance of 0.03 meters, 0.26μT; the host side of the 0.29μT, the left side of the chassis face the center of the distance of 0.03 meters, 0.23μT. 0.46μT behind, but we generally There is a certain distance from the back of the mainframe, so the impact is not significant. There is a moment of power on, standby state are 0.17μT. Another thing to say is that the desktop computer power wiring if then connected to the state of radiation is 0.47μT, so then use desktop computers should also keep the distance.
Desktop computer host radiation index: ★★★★☆☆
But the next test is not very optimistic, subwoofer speakers, the center of the operating panel, distance 0.03 meters, 0.63μT; speakers right side of the face of the center, the distance of 0.03 meters, 5.68μT; radiation but is not small, it's a safe distance is how much? After careful testing found that when the distance of 0.4 meters, its radiation is reduced to 0.17μT. So the subwoofer speaker radiation is serious, use at least half a meter distance.
Radiation index of the subwoofer speakers: ★★★★☆
Last but not least is the laptop, 0.1 meters in front of the display 0.13 μT, 0.3 meters in front of the display 0.10 μT, 0.3 meters to the side of the display 0.13 μT, 0.19 μT above the keyboard, the power adapter 0.22 μT. The results of the test show that the laptop keyboard radiation is slightly stronger, the power adapter is the largest. The power adapter is the largest.
Notebook radiation index: ★ ☆☆☆☆
Tips: LCD radiation is very small, CRT monitors slightly larger, but are in the safe range; host behind, side radiation is larger, we strongly recommend that you do not in order to dissipate heat for convenience, open the chassis to use; the subwoofer speaker radiation is serious, use at least keep half a meter away; laptop radiation is concentrated in the keyboard above, the use of the power adapter should be with the power adapter, the power adapter is the largest. When using a laptop, you should keep a distance from the power adapter.
Hey, by the way, the light said that this computer and laptop radiation is not big, but that photoelectric mouse a moment of red a moment of blue is quite scary, there is radiation? That wireless mouse, wireless keyboard is not radiation is smaller than ordinary? There are also wireless LAN transmitters!
This is the first time I've ever seen a digital camera with a battery, and I've never seen a digital camera with a battery.
Ordinary mouse: 0.1μT
Ordinary keyboard: 0.11μT
Wireless mouse: 0.53μT (above the mouse)
Wireless keyboard: 0.96μT (above the keyboard)
Wireless gateway: 0.15μT (above the gateway)
And the printer: 0.11μT
Digital camera power adapter : 0.11μT
MP4 power adapter : 0.16μT
Radiation index of ordinary mouse, ordinary keyboard, wireless gateway, printer, power adapter for digital camera and MP4: ★☆☆☆☆;
Radiation index of wireless mouse and wireless keyboard: ★★★★★★☆☆
Tips: Ordinary keyboards, mice, and wireless gateways, printers, digital cameras and MP4 power radiation is not large, can be used without fear. But the wireless keyboard, wireless mouse radiation.
3. Cooling and heating appliances, electric blankets
Air conditioning is the longest used in the bedroom, the largest power, it is reassuring that the moment of switching on and off, normal use of its radiation is only 0.1μT, in the mute, sleep, and other modes of radiation value changes are also small.
In winter, some families like to use small electric heaters, heaters and other heating appliances, but their radiation is not small, first look at the infrared heater, the results of the test at a distance of 1mm: above the radiation is 1.8μT, side 5.4μT, radiation intensity is very large, we did another 1m away from the test, the radiation was cut to 0.14μT. heater close to the test results are 9.3μT, the radiation value in various modes, including silent, sleep, etc. also changes little.
When the electric blanket is used in high grade, it is 0.71μT near the power supply, 1.15μT in the left corner of the power supply side, 0.71μT in the right corner of the power supply side, and 0.55μT in the center part of the blanket; when it is used in low grade, it is 0.70μT in the left corner of the power supply side, and 0.49μT in the right corner of the power supply side, and it seems to be quite a lot of radiation from the blanket.
The other big source of radiation in the bedroom is the electric fan, 2.6μT in low wind, 0.9μT in high wind; however, 2m away, the radiation is attenuated to 0.11μT.
Tips: air-conditioning radiation is relatively small, you can rest assured that you can use it, but infrared tube heater, heater, fan radiation is greater, it is recommended that you use at least keep a meter away from the use of electric blankets. Electric blanket radiation is also larger, it is recommended to use less.
Humidifiers, air purifiers
We found that this fan humidifier has the highest level of radiation in our tests, with a result of 49 μT when tested close to it, 15 μT when used in a low gear, and 32 μT when used in a high gear, though it was cut to 0.52 μT when used at a distance of 1m. The ultrasonic spray humidifier tested close to it was 9μT, and 1m away was 0.22μT. The air purifier tested close to it was 0.35μT, and 0.5m away was cut to 0.12μT.
Tip: Humidifiers and air purifiers should not be placed too close to the human body.
Humidifier radiation index: ★★★★★
Air purifier radiation index: ★★★★☆☆
Induction cooker electric hot pot microwave
Like to use induction cooker hot pot people should pay attention to it, it's radiation is not small, look at the results of the test, induction cooker above the 0.1 meters 2.80μT, induction cooker above the 0.3 meters 1.40μT
The test results show that the induction stove is more radioactive, and the electric cooker is better compared to the induction stove.
Subsequently, we first tested the microwave oven which we are most concerned about, and found that the radiation in the doorway of the microwave oven is the biggest, so we did a detailed test:
Medium-range fire: 0.03 meters in front of the doorway 17.32μW/㎝2,
0.3 meters in front of the doorway 2.01μW/㎝2
1 meter in front of the doorway 0.41μW/㎝2
The radiation in the doorway 1 meter in front of the doorway 0.41μW/㎝2
The radiation in the doorway is the most important. p>
Center of microwave oven door: 1m from the door: 150.7μW/㎝2
The test result shows that the radiation is the highest when the microwave oven is activated (the value (0.05m from the door) is around 18 to 22μW/㎝2,).
Tips: Induction cooker radiation is large, electric hot pot is relatively small, it is recommended to use the induction cooker, electric hot pot time is not too long, use should also maintain a certain distance. Microwave ovens start when the radiation is the largest, it is recommended that you do not get too close when cooking with a microwave oven.
Radiation Index: ★★★★★★★
Refrigerator Range Hood Ozone Sterilizer Ozone Machine Rice Cooker Electric Cake Pan Electric Kettle Juice Extractor Soybean Milk Maker
Refrigerator: Outside the Door 0.13μT Inside the Door (Open Door) 0.16μT
Refrigerator Range Hood: In front of the front 0.1 meters under the open state 0.38μT, in front of the front 0.1 meters off the machine instantly 0.11μT
Ozone sterilizer: open door 0.14μT
Ozone machine: (open lid) 0.55μT
Rice cooker: (in front) 0.16μT
Electric pancake pan: (tightly above) 3.60μT
Electric kettle: (tightly above) 1.20μT; (0.1m) 0.30μT< /p>
Juice Extractor:10.00μT
Soymilk Machine: (close to) 0.86μT; (0.1 meters) 0.30μT
Tips: Refrigerator, ozone sterilizer, rice cooker radiation can be assured that the use of a smaller; electric pie pan, range hood radiation is slightly larger, belonging to the warning range, pay attention to the use of do not stick too close to the; ozone machine, soya bean paste machine, juice extractor Radiation are larger, it is best not to let children use.
Vacuum cleaners, irons, hair dryers, power terminals
We tested this large vacuum cleaner before, the radiation under normal use is 15μT, but it is not small ah; now also popular with this small handheld vacuum cleaner, how much radiation is it? We also did a test, the handle at a distance of 0.03 meters: 6.64 μT; the left side of the face of the center: 4.22 μT; however, if you use this, its radiation can be attenuated to a safe range, the back of the 0.2 meters: 0.15 μT.
Large vacuum cleaner radiation index: ★★★★★
Smaller vacuum cleaner radiation index: ★★★★☆
Iron is also quite a bit of radiation, but it's not a big deal.
The radiation of the iron is also quite large, we did a detailed test, and found that the radiation will increase when the iron is heated, in the heating state, the handle, 1.22μT; however, it is in the constant temperature state, the radiation is attenuated to 0.12μT. Therefore, if you are ironing clothes, it is best to heat the temperature in place at one time, and then continue to heat for a while, and don't heat the iron while ironing clothes.
Iron radiation index: ★★★★☆
Hairdryer is also a big source of radiation we found, before the test, low-grade 4.20 μT, high-grade 10.00 μT; and after the hot air gear, the hair dryer in different parts of the detailed test, the handle at 0.03 meters, 10.95 μT; outlet, 7.16 μT, it seems that the hair dryer also really It seems that the hair dryer really should be used less.
The radiation index of the hair dryer: ★★★★★
There is another point to remind you is that the power terminal board, if there is no electrical equipment connected to the distance of 0.03 meters, its radiation is only 0.11 μT, it is not big; but in the high-power electrical equipment connected to the distance of 0.03 meters, its radiation can be 1.25 μT. This can be cause for you to pay attention to.
The radiation index of the power terminal board (in use): ★★★★☆
Text: The radiation of vacuum cleaners and hairdryers is large, and the radiation of irons is not small, so they should be far away from children, and the radiation of the power terminal board should be noticed, and should not be put at the head of the bed.
Electric footbath, treadmill, fat exercise machine
This is now a popular electric footbath, let's see how much radiation it is? 0.03 meters from the power line, 2.20μT.
Radiation index of electric footbath: ★★★★★☆☆
There are also people who like to exercise at home, how much radiation does this treadmill emit? Treadmill in working condition, 0.15μT at the panel, 3.90μT at the front of the conveyor belt, 0.11μT at the end of the conveyor belt.
Treadmill radiation index: ★★★★☆☆☆☆
Ladies love beauty, and always like to slim down, so let's see how much radiation is in the fat exercise machine? Fat Exercise Machine, Side, High Speed Gear, 5.48μT at 0.03m.
Radiation Index of Fat Exercise Machine: ★★★★★
Tips: Electric Footbath Radiation, Fat Exercise Machine Radiation are all larger, and the front of the treadmill conveyor belt is more radioactive.
What spectrum meter and so on is not radiation is not small ah?
In fact, as long as the infrared are not in the scope of our test, and it produces is not electromagnetic radiation. So you can rest assured that you don't have to worry.
4. Lamps
First from the lamp, this is the master bedroom lamp, its radiation value is 0.17μT, this is the children's use of energy-saving eye lamps, its radiation value is also 0.11μT, the study is the use of old-fashioned lamps, its radiation is 0.1μT.
The fluorescent lamps are tested: the master bedroom 0.12μT, the living room 0.18μT, the study 0.18μT, the lamp is 0.12μT, the lamp is 0.12μT, the lamp is 0.12μT, the lamp is 0.18μT, the lamp is 0.12μT, the lamp is 0.18μT, the lamp is 0.18μT.
The test results for fluorescent lamps were: master bedroom 0.12μT, living room 0.18μT, study 0.11μT, and children's favorite cartoon wall lamps, which radiated 0.11μT.
Hint: The radiation of all kinds of lamps and lanterns passed the test, so you can use them without worrying about the radiation.
No need to spend any money to avoid it. One of the most effective ways is to keep a distance, and it must be a safe distance of more than 3 meters.
That if the home should be rationalized, because experts recommend that it is best not to wear protective clothing, the human body itself is a large conductor, wearing it can only be shielded from radiation into the human body, and now there is no clear standard for the material of the protective clothing, the price is also uneven, so it is recommended that you do not gullibly protect the role of clothing. [edit]Maintaining your body I. Facial protection
While the Internet does not lead to a great enemy,
but the powerful electromagnetic radiation should still do enough facial work.
Screen radiation generates static electricity, the most easy to attract dust, face to face for a long time, more likely to lead to spots and wrinkles. Therefore, before surfing the Internet may be coated with skin lotion plus a layer of light powder to slightly increase the skin resistance.
2. Thoroughly clean the skin
After the end of the Internet, the first task is to clean the skin, with warm water plus cleansing liquid thoroughly clean the face, the electrostatic adsorption of dust and dirt washed away, coated with a mild skin care products. Long time can reduce the harm, moisturize the skin. This is really a small move for women who are online.
3. Maintenance of bright eyes
If you do not want to see people the next day when the eyes red, dark circles under the eyes coupled with haggard face, do not long continuous combat, especially do not stay up all night surfing. Usually prepare a bottle of eye drops in case of emergency. After surfing the Internet, apply a cucumber slice, potato slice or frozen milk, herbal tea is also good. Its method: the cucumber or potato slices, compress on the eyelids, eyes closed for a few minutes; or frozen milk herbal tea with gauze soaked eyes, can relieve eye fatigue, nutritional skin around the eyes.
4. Increase nutrition
For those who often surf the Internet, it is important to increase nutrition. Vitamin B complex is very beneficial to brain workers, if you sleep late, the quality of sleep is not good, you should eat more animal liver, fresh fruits and vegetables, they are rich in vitamin B; meat, fish, dairy products to increase memory; chocolate, wheat flour circles, seafood, dried fruit can enhance the coordination of the nervous system, is the best snacks when surfing the Internet. In addition, from time to time, drink some wolfberry juice and carrot juice, on the eyes, skin care efficacy is remarkable. If you care about your appearance, hurry up to abandon those carbonated drinks and drink carrot juice or other fresh fruit juice instead.
5. often do gymnastics
Long time online, you may feel dizzy, stiff fingers, back pain, and even lower limb edema, varicose veins. Therefore, usually do gymnastics to maintain high energy, such as lying flat on the bed before going to bed, the whole body relaxation, tilt the head on the edge of the bed below, alleviate the lack of blood supply and oxygenation of the brain after the brain; cushion feet, lying flat on the bed or sofa, to reduce foot edema, and help blood flow back to prevent varicose veins of the lower limbs; in the process of surfing the Internet from time to time to stretch your waist, stretching the sinews or lean back on the chair, the hands force back, to stretch tension and fatigue lumbar, and the back of the chair. to stretch the tense and tired lumbar muscles; do finger shaking exercise, which is the easiest way to completely relax the fingers. Remember, this type of gymnastics is not a lot of exercise, but far more effective than a nap.