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Arslan
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Why magnetic fields from magnet r slenoid are not dangerous but if we have an antenna radiating elctromagnetic fields is dangerous?
Arslan said:Why magnetic fields from magnet r slenoid are not dangerous but if we have an antenna radiating elctromagnetic fields is dangerous?
dabi said:A static magnetic field does not transport any energy, whereas electromagnetic fields do.
The danger comes from the absorption of this energy by molecules which get destroyed,
think of UV-radiation and skin cancer.
ZapperZ said:Where does one encounter a "UV" antenna?
Zz.
dabi said:This was an example of electromagnatic fields, that are really harmful.
The energy emitted by antennas is much to weak to give any direct
indication for health threats.
[PLAIN]http://xa.ly/gGd[/QUOTE]
You do remember the original question, don't you?
Arslan said:Why magnetic fields from magnet r slenoid are not dangerous but if we have an antenna radiating elctromagnetic fields is dangerous?
Zz.
ZapperZ said:Where do you get the idea that the latter is dangerous?
Zz.
Arslan said:They are really dangerous. Microwave Consists of waveguide that radiate microwaves into oven and cock food too.
From the big warning notices, the fence and the number of lockouts and sign-offs I have to get before I climb upto the feed horn.ZapperZ said:Where do you get the idea that the latter is dangerous?
NobodySpecial said:From the big warning notices, the fence and the number of lockouts and sign-offs I have to get before I climb upto the feed horn.
The poster didn't say that RF antennea around them are dangerous, they just asked why you don't want to put your head inside a KW radar but you can put your head inside a 4T MRI
That and the risks of the incredibly weak gravity field when I'm 30m up in the air ;-)ZapperZ said:Are you sure those notices are not predominantly for high voltage?
An "antenna" emitting EM signal is not automatically dangerous.
Studiot said:I'm sorry, but I have to respectfully disagree with you.
Anything capable of causing significant physical harm to a human can be classified as dangerous.
It is not necessary for it to ever have done so, just that it possesses the capability. Many things in our lives and environment are thus dangerous. Life is full of danger. That is why we all have to learn how to avoid or control the danger.
Then you're saying that a flashlight emitting light is a "dangerous" source of EM radiation.
Studiot said:In principle, yes. If you shine it directly into a driver's eyes, you could temporarily blind him and cause a fatal accident.
Magnetic fields are considered safe for health because they do not produce any harmful ionizing radiation. They are also not strong enough to disrupt the chemical bonds in our bodies. On the other hand, electromagnetic fields, especially those from high-voltage power lines, can produce strong electric and magnetic fields that can interfere with the functioning of our body's cells and tissues, leading to potential health risks.
Magnetic fields are produced by the movement of electrically charged particles and can exist independently of electric fields. On the other hand, electromagnetic fields are created by the oscillation of electric and magnetic fields and are closely related. Electromagnetic fields also have the ability to travel through space, while magnetic fields cannot.
In general, exposure to low-level magnetic fields is not considered harmful to health. However, long-term exposure to extremely high levels of magnetic fields, such as those found in MRI machines, can lead to harmful effects such as headaches, dizziness, and nausea. It is important to follow safety guidelines and limit exposure to high levels of magnetic fields.
Yes, there are several medical treatments that utilize magnetic fields, such as magnetic resonance imaging (MRI) and transcranial magnetic stimulation (TMS). These treatments have been found to be safe and effective for various medical conditions, including diagnosing and treating brain disorders.
To reduce exposure to electromagnetic fields, it is recommended to maintain a safe distance from high-voltage power lines, limit the use of electronic devices, and use shielding materials to block EMF emissions. It is also important to follow safety guidelines and regulations set by governing bodies to ensure safe levels of exposure in occupational and residential settings.