The microwave oven has radiation, should we stay away?
The router has radiation. Will it cause cancer if placed at the bedside?
The hair dryer has radiation. Will it affect the brain if it is too close?
I believe more than one person will ask these questions.
In fact, Dr. Clove can fully understand, after all, fear of unknown things is in line with human nature.
However, if you are always worried about all kinds of [carcinogenic] or even [fatal] risks lurking around you all day long, then the day will not pass.
Therefore, Dr. Clove would like to emphasize several radiation-related [truths] today.
When the microwave oven works, how far is it safe?
First of all, Dr. Clove should simply explain two words: radiation and electromagnetic radiation.
1. Radiation can generally be divided into two types, ionizing radiation and non-ionizing radiation
- Ionizing radiation can ionize substances and cause damage to cells and even DNA, which is dangerous. Non-ionizing radiation has no ability to ionize substances and is safe.
2. [Electromagnetic Radiation] There is also a name called [Electromagnetic Wave]
High energy (high frequency) electromagnetic radiation is ionizing radiation, only this part of electromagnetic radiation is dangerous.
Knowing these two points, the problem of microwave oven is easy to say.
Microwave is non-ionizing radiation and belongs to [radio wave].
On hearing the radio waves, some people may ask: Are microwave ovens and radios related?
Yes, the main use of the low and medium frequency parts of radio waves is communication, such as radio. The higher frequency parts of radio waves (frequencies from 300MHz to 300 GHz) are microwaves, and a typical use of microwaves is microwave ovens.
The main effect of microwave on biological tissues is heating, but the microwave will be reflected by metal, so the electromagnetic field that can be detected outside the microwave oven is much smaller than that in the microwave oven.
In other words, as long as you stay outside the microwave oven and don’t stick your face on it, there will usually be no what injury.
When a wireless router works, how far is it safe?
As long as it is not under the pillow, it is safe.
The electromagnetic waves emitted by wireless routers are non-ionizing radiation, and most of them have frequencies of 2 GHz (or 5 GHz).
As for ionizing radiation that can directly cause damage to organisms, in fact, the frequency threshold is very, very high, reaching at least 100000000000000000 Hz (10 to the 17th power), which is almost 50 million times of 2 GHz, and there is still seven or eight zeros behind!
Therefore, don’t worry about the radiation problem of wireless routers any more.
Of course, the router will still get hot when it works, and it is not comfortable to bake itself too close, so put it further away.
When the hair dryer works, how far is it safe?
As long as it is not pasted on the scalp, it is safe.
Some people say that hair dryers will generate strong electromagnetic fields when they work, which is harmful to human body. In fact, this worry is unnecessary.
The electromagnetic field generated by the hair dryer is the electromagnetic field of alternating current that we usually use, that is, the electromagnetic field of 50 Hz.
This kind of electromagnetic field cannot propagate at all. It can only form a magnetic field near the position through which current passes, and will decay greatly with the increase of distance.
As for the size of the magnetic field, data show that the magnetic field near the hair dryer is about 350 mG, while the magnetic field strength of a common magnet is several hundred to several thousand G, which is at least several thousand times worse.
So that’s the same sentence-don’t worry.
In fact, from the perspective of energy alone, sunlight is much stronger than any electrical appliance around us, not to mention the harmful radiation of ultraviolet rays in sunlight.
But you have never heard of anyone who doesn’t go out because of the sun’s radiation, do you?