Radiation

Definition

All objects in nature, as long as the temperature is above absolute zero, are continuously transmitted outward in the form of electromagnetic waves. Heat, this way of transferring energy is called radiation. The energy emitted by objects through radiation is called radiant energy, or radiation for short. Radiation is calculated in terms of roentgen/hour (R)

Radiation is emitted outward in the form of electromagnetic waves. It spreads energy in the form of waves. Radio waves and light waves are both electromagnetic waves. They propagate very quickly, at the same speed as light waves (3×1010 cm/sec) in a vacuum and slightly slower in air.

Electromagnetic waves are composite waves composed of waves of different wavelengths. Its wavelength ranges from cosmic rays of 10E-10 microns (1 micron = 10E-4 centimeters) to radio waves with wavelengths of several kilometers. Gamma rays, X-rays, ultraviolet rays, visible light, infrared rays, ultrashort wave 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 to 0.76 microns. This part is called visible light. After visible light is split by a prism, it becomes a light band composed of seven colors: red, orange, yellow, green, cyan, blue, and violet. This light band is called a spectrum. Among them, red light has the longest wavelength, violet light has the shortest wavelength, and the wavelengths of other colors of light are in between. Those with wavelengths longer than red light (>0.76 microns) include infrared rays and radio waves; those with wavelengths shorter than purple light (<0.4 microns) include ultraviolet rays, gamma rays, X-rays, etc. Although these radiations are invisible to the naked eye, they can be measured with instruments.

The wavelength of solar radiation is mainly 0.15-4 microns, of which the maximum radiation wavelength is 0.5 microns on average; the wavelength of ground and atmospheric radiation is mainly 3-120 microns, of which the maximum radiation wavelength is 10 microns on average. It is customary to call the former shortwave radiation and the latter longwave radiation.

Hazards

People who work, study, and live in an environment with concentrated radiation sources are prone to insomnia, memory loss, physical weakness, low immunity, etc., and their cancer cells The growth rate is twenty-four times faster than that of normal people.

How far is radiation from us? Radiation is everywhere in our living environment!

Household appliances: TVs, refrigerators, air conditioners, microwave ovens, vacuum cleaners, etc.

Office equipment: mobile phones, computers, copiers, electronic instruments, medical equipment, etc.

Home decoration: marble, composite flooring, wall paper, paint, etc.

Surrounding environment: high-voltage lines, substations, television (radio) signal transmission towers, etc.

Natural environment: sunspots, etc.

A healthy person can withstand a short-term load of 5000R, but a dose of only 700R is enough to put a healthy person under a fatal threat. However, everyone's body's resistance is different, and everyone will have different degrees of symptoms. Generally, exposure to electromagnetic radiation pollution can cause central nervous system problems such as headaches, insomnia, and irregular heartbeat. At the same time, it may affect some people's eyes, causing vision loss, skin diseases, etc., and in severe cases, it may cause cancer. Pregnant women may suffer miscarriages, and elderly people with pacemakers should be especially careful. At the same time, different people or the same person at different age groups have different tolerances to electromagnetic radiation. Even in an environment that exceeds the standard, it does not mean that everyone will get sick. Therefore, there is no need to be cautious about electromagnetic radiation. However, preventive measures should be taken for the elderly, children, pregnant women or patients with pacemakers, people who are sensitive to electromagnetic radiation and people who work in an environment with excessive doses of electromagnetic radiation for a long time.

Prevention

With the rapid development of science and technology, various technological products and household appliances have entered people's lives, all of which have greatly improved people's work efficiency, It has improved people's lives. I can't imagine what people's lives would be like without these live devices. However, as high-voltage power and transmission towers around cities get higher and higher, and there are more and more electrical equipment in homes, people feel convenience but are also being harmed. At present, electromagnetic radiation pollution has become the fourth major environmental pollution after water, air and noise.

What would you do if one day you were suddenly told that the house you live in was exposed to severe electromagnetic radiation? Among these many household appliances, can you find which ones have higher radiation levels? What is electromagnetic radiation? From a professional perspective, electromagnetic radiation is the phenomenon of energy propagating through space in the form of electromagnetic waves. Almost any electrical appliance in our homes produces electromagnetic radiation. Such as microwave ovens, televisions, computers, mobile phones, etc.!

Protective clothing: including coats, vests, aprons, maternity clothes, etc., made of special fibers, which have good anti-electromagnetic radiation and anti-static effects. Especially for families with microwave ovens, it is best to equip them with protective aprons, which can effectively prevent electromagnetic radiation. For pregnant women, if they come into contact with electrical equipment, they must wear protective bellybands or protective clothing to ensure the healthy growth of the fetus.

Anti-radiation screen: It has multiple functions such as anti-radiation, anti-static, anti-glare, etc., and also has a certain effect on protecting eyesight.

Another way is to pay attention to time and distance.

The degree of damage is directly proportional to time, which means that the longer the exposure to electromagnetic radiation, the greater the damage. It is inversely proportional to the distance. If the distance is increased ten times, the radiation received is one percent of the original. If the distance is increased one hundred times, the radiation received is one ten thousandth.