Zhang Chaoyang questioned 5G: Such high-frequency electromagnetic waves are very harmful to the human body

白丁

Zhang Chaoyang questioned 5G: Such high-frequency electromagnetic waves are very harmful to the human body [Copy link]

 

On May 17, Zhang Chaoyang attended the Sohu Technology 5G Summit and talked about his understanding of the 5G era. Zhang Chaoyang believes that the density of 5G base stations is extremely high because it is millimeter wave, so microwave, high frequency, several gigahertz, in fact, it is very harmful to the human body. Under this kind of electromagnetic wave, some oscillation frequencies of water molecules and oxygen may resonate. Zhang Chaoyang said that after the arrival of 5G, while we enjoy the future technological progress and convenience brought by 5G, we should also pay attention to the impact of electromagnetic waves on the human body.

白丁

Zhang Chaoyang, a PhD in physics from MIT, is what he said reasonable?

白丁

littleshrimp

The frequency of 5G is around 3.5G. In the future, car radars will be able to reach 100G. Will it be more dangerous to drive such a car?

chunyang

All objects around us are emitting radiation, thermal radiation, and the frequency is much higher than the operating frequency of 5G, not to mention the radiation from the sun and the universe. Just as it is a hooligan to talk about toxicity without talking about dosage, when talking about whether radiation is harmful, we must examine its frequency-power spectrum. At present, there is no theory or test data to support that the electromagnetic waves used in mobile communications have observable damage to the human body.

chunyang

In the history of human radio communication development so far, if the intensity of modulated radio wave radiation from the earth is observed from outside the earth, the intensity of radio radiation from the earth increased rapidly after World War II and reached its peak in the 1980s. After entering the 21st century, the radiation intensity decreased rapidly. 5G operates at a higher frequency and the environmental transmission attenuation is greater, so more access nodes can only be deployed. Observed from a distance, the radiation intensity will be further reduced. Even near the base station, due to the reduced radiation power of a single base station, the field intensity of radio radiation exposed to the human body is lower. Compared with the period in the 1980s when a large number of high-power wireless radio stations and TV stations were active, the radio radiation field intensity in large cities has been greatly reduced.

chunyang

Have you ever eaten cyanide? Yes, it is the highly toxic cyanide. The head of state once died with it. But I dare say that I have eaten it, and everyone has eaten it, and the higher the living standard, the more delicious it is. The seeds of all Rosaceae plants contain cyanide, including the common apples, pears, crabapples, peaches, apricots, plums, cherries, etc. on the market. If the seeds are broken, the cyanide in them will inevitably contaminate the fruit. Have you ever eaten a cut apple? Cutting the apple core will inevitably come into contact with cyanide. Have you ever eaten almonds? Almonds must contain cyanide, even sweet almonds. Why is it said that talking about poisons without talking about dosage is a hooliganism? Do you understand? The same is true for radio radiation.

qwqwqw2088

High-power electromagnetic waves can cause radiation damage to the human body. If high-frequency electromagnetic waves are not high-power, the radiation to humans is not great. Specifically for 4G or 5G, including wifi, the frequency is relatively high. As discussed before, the harm to humans is mainly from base stations. Mobile phones and wifi should be far below the international or national standard radiation range. However, I still think it is necessary for the relevant industry departments to announce

chunyang

qwqwqw2088 posted on 2019-5-18 23:51 High-power electromagnetic waves can cause radiation damage to the human body. If high-frequency electromagnetic waves are not high-power, the radiation to humans is not great. Specifically for 4G or 5G, including wifi...

Don't just look at the power, you also have to look at the distance. The effective parameter for measuring the intensity of radio radiation is the field strength. The transmission power of a mobile base station is indeed much greater than that of a mobile phone, but the distance is also much farther. The field strength decays exponentially with the square of the distance. Unless you are close enough to the base station, the field strength you receive is far less than that of your mobile phone. For radio transmitters, countries around the world have strict legal provisions, including China. The relevant legal texts can be downloaded and consulted from the official websites of the Ministry of Industry and Information Technology and the Radio Commission. Therefore, there is no such thing as "it is necessary for relevant industry departments to announce it". It has always been open and announced.

白丁

qwqwqw2088 posted on 2019-5-18 23:51 High-power electromagnetic waves can cause radiation damage to the human body. If high-frequency electromagnetic waves are not high-power, the radiation to humans is not great. Specifically for 4G or 5G, including wifi...

If high-power electromagnetic waves are harmful to the human body, what kind of damage will they cause to the human body?

白丁

chunyang published on 2019-5-19 11:51 Don’t just look at the power, but also the distance. The effective parameter for measuring the intensity of radio radiation is the field strength. The transmission power of a mobile base station is indeed much greater than that of a mobile phone, but...

The power should be the power that is exposed, not the transmission power. There are many routers that are marketed as low-radiation routers. It seems that it is nonsense for pregnant women and children to use them. Logically, the transmission power of the router should be much smaller than that of 4g. The 4g signal has no problem passing through walls, but the router cannot pass through two walls. The frequencies of the two are not much different, and the wavelengths should be about the same. Foreign routers generally have poor signals, while domestic signals are relatively strong. It seems that the standard is 100mW.

chunyang

Bai Ding published on 2019-5-19 21:52 The power should be the power that is exposed to, not the transmission power. There are many routers that are low-radiation routers. It seems nonsense to say that pregnant women and children use them...

As mentioned earlier, the field strength is used to measure the radiation intensity, not the power, because the signal strength decays rapidly with the distance at a quadratic exponential rate. As for the "low-radiation router" for pregnant women and children, it is completely nonsense. It is a lie to use something that has no evidence to prove that it is harmful. It is a bad behavior to cause panic to others for the sake of one's own interests. I firmly resist such unscrupulous merchants and their products, and call on everyone to boycott them together.

chunyang

Bai Ding posted on 2019-5-19 21:45 If high-power electromagnetic waves are harmful to the human body, what kind of harm will they cause to the human body?

Let’s first define “high power” before we can analyze it. What is known is that in the 100 years since Marconi’s time, all radio transmission equipment in normal use has not been observed to cause harm to the human body, and this is not supported in theory, which is enough to illustrate the problem.

chunyang

Let me emphasize the "placebo effect" again. A large number of tests have shown that placebos can produce effects, both positive and negative, that is, a person's mental and psychological state can affect their physical condition, so the effectiveness of medicines must be confirmed through placebo comparison. The placebo effect has an impact on the "harmful electromagnetic radiation theory". If you firmly believe that electromagnetic radiation from mobile base stations, mobile phones, WIFI routers, etc. is harmful, then it may really be harmful, but it is not the electromagnetic radiation that is harmful, but your psychological state, that is, the placebo effect.

chunyang

What kind of electromagnetic radiation is harmful? The correct answer is "ionizing radiation", which is ultraviolet rays, X-rays and gamma rays with a wavelength short enough. The mechanism is that high-energy photons will strip the outer electrons of atoms, which will affect chemical bonds and then affect compounds. We all learned this in high school chemistry, which means that all high school graduates should understand it. If you bask in the sun for a while, the electromagnetic radiation you receive is much stronger than any base station, mobile phone, router, etc., and the sun contains ionizing radiation components, which are known to cause fatal malignant melanoma. Are you afraid? Hide in the house? There is always high-energy radiation from the universe and high-energy radiation generated by the decay of the earth's own radioactive elements. This is called "background radiation". The sum of background radiation and solar radiation is much stronger than any radio transmitting equipment, and it is known to be one of the causes of cancer and mutations, but no one can avoid it. Are you afraid? Compared with solar radiation and background radiation, if solar radiation and background radiation are bullet rain on the battlefield, then the radiation from base stations, mobile phones, routers, etc. is just sand under your feet. Should you worry about a stray bullet hitting you or worry about being burped to death by a grain of sand? The most important thing is actually scientific thinking.

whuer

The current dual-band WIFI routers have frequencies of 2.4GHz and 5GHz, while the frequency of 5G base stations is 3.5GHz. Logically speaking, dual-band WIFI routers are more harmful than 5G base stations? When you buy a wireless router, do you specify a dual-band router?

whuer

The current dual-band WIFI routers have frequencies of 2.4GHz and 5GHz, while the frequency of 5G base stations is 3.5GHz. Logically speaking, dual-band WIFI routers are more harmful than 5G base stations? When you buy a wireless router, do you specify a dual-band router?

zhuyebb

Pure friendly support

chunyang

whuer Published on 2019-5-20 02:52 The current dual-band WIFI routers have frequencies of 2.4GHz and 5GHz, while the frequency of 5G base stations is 3.5GHz. Logically speaking, dual-band WIFI routers are more dangerous than 5G base stations...

"Logically speaking, dual-band WIFI routers are more dangerous than 5G base stations" - What is the logic behind this? Where does it come from? Who said it? What evidence and theory are there to support this?

eastin8

It seems that 5G still has many problems.