Is it harmful to watch TV
The use of new appliances introduces comfort, convenience and variety into our lives. Transmission of a long time in front of the TV for many has become a habit, creating the illusion of rest. And is this habit harmless, does not the radiation come from the TV?
The cumbersome, awkward apparatus with a cathode-ray tube is gradually becoming the property of history, and with it the X-ray radiation that this generation of home television screens has sinned. Now our hearing is pleased with such names as liquid crystal, plasma and led TV.
Is there any radiation from the LCD TV?
In LCD TVs there is no main source of radiation - a cathode-ray tube. They have a different principle of work, in which the image is created by special lighting elements. At the same time, the monitor maintains a voltage of only 5 watts.
The source of radiation here can serve as control circuits, converters, conductors. However, considering that the current passing through them is only one milliampere, and all potentially dangerous nodes are shielded, the radiation from the LCD TV is about 4 times weaker than from its predecessors. The listed elements are located in the back of the monitor. Consequently, electromagnetic radiation can emanate from there as well.
The best protection against the radiation of the TV is its remoteness. To determine the safe distance, multiply the diagonal by 5.
What kind of radiation does a LED TV have?
A new modification of the LCD TV are devices called LED. In them, the lamp illumination is replaced by LEDs, which are not sources of additional harmful effects. Therefore, the radiation of LED TVs does not exceed the radiation level of their LC counterparts.
An important advantage is their greater environmental friendliness than conventional LCD TVs. The LEDs do not use mercury, which is a component of filling fluorescent lamps used for backlighting in LCD TVs.
Radiation from a plasma TV
In the models of plasma TVs, the layer of liquid crystals is replaced by tiny cells filled with an inert gas. The discharge of a powerful power supply generates ultraviolet and visible radiation. The ultraviolet is delayed by the glass, and the visible spectrum gives us a picture, which we see on the screen.
Electromagnetic radiation from a plasma TV does not have a harmful effect on the viewer. But electronic noise caused by the passage and switching of current, can interfere with the operation of radio receivers and remote controls.
The power supply for the 42-inch plasma monitor is 350 watts. Therefore, its operation is accompanied by considerable heating. Discomfort from thermal radiation is especially great in the summer. Manufacturers are forced to install a variety of cooling systems. Therefore, when working with plasma devices, an outside noise is heard. But gradually the transition to fanless cooling is carried out.
On sale appeared protective filters, which allow to neutralize harmful part of electromagnetic radiation from plasma TVs.
For many decades of its development, our faithful home friends - television receivers, have undergone significant changes in the principle of work. If someone's minds are excited by the question of whether the TV emits radiation, it is possible to give a negative answer with confidence. Neither old models with kinescopes, nor more modern ones - plasma and LCD TVs - are sources of radioactive radiation.
Radiation from a television tower
Television, which is a gift of genius to humanity, at the same time brought him a lot of extra worries. One of them is the radiation of a television tower, which has a negative effect on human health. Therefore, the sanitary services pay close attention to the location of these facilities.
The towers should not be within the city limits. The nearest housing should be located at a distance of at least 500 meters. Unfavorable electromagnetic radiation covering houses within a radius of 200 meters is fraught not only with the rapid fatigue of its inhabitants, but also with a violation of the logic of thinking, memory loss, cancer and other serious health disorders.
Since the maximum radiation of these aerial-mast structures falls on the upper part of the TV tower, high-altitude structures should not be located in the danger zone.
What harm from the TV and how to minimize it
Having received an answer to the question of what kind of radiation from TVs of different types, we will discuss whether it is harmful, in general, to watch TV.
In the environment of thinking and advanced people, many adherents of the refusal to watch television programs appeared. There are a lot of reasons for this. An important place among them is taking care of spiritual and physical health. Telemania drives people to the blue screen, overfilling with redundant, often unnecessary information. The flow of scenes of violence and low emotions immerses viewers into a state of stress, and viewing annoying ads - causes feelings of inferiority of one's own life. A multi-hour seat in front of the screen, increases the risk of heart disease, promotes obesity and the development of diabetes.
All of the above should not be seen as a call for a complete refusal to watch television programs. But the culture of communication with the TV must be present.
- It is necessary to learn how to carefully choose the themes and scope of watching TV programs. Given that the maximum time for an adult should not exceed 4 hours, and for a child - 2 hours.
- Anticipating an interesting transmission, it is convenient to sit directly in front of the screen, and turn on the light. In this case, the distance to the TV should correspond to its diagonal. In a small screen it is best to look from a distance of 1.2 to 2.2 meters. The device with a diagonal of 32 "is recommended to be installed at a distance of 2.5-5.3 meters to the viewing point.
- You need to try not to hold your breath and do not fix the sight at one point of the screen even with the most exciting plot.
- To avoid dry eyes, blink frequently.
With such simple truths, your communication with the TV will be truly useful and safe.