Is wifi really harmless? Let’s talk about the impact of wifi on us
The rise of mobile devices has gradually brought wifi into thousands of households.
In the near future, perhaps we will live in an "ocean world" filled with WiFi.
So we can’t help but ask, is wifi really harmless? If not, how can we prevent the harm it causes?
The answer is what many people think, wifi is harmless.
But why? Take a microwave oven for comparison. First of all, the WiFi radiation intensity is 100,000 times weaker than that of a microwave oven.
Secondly, the microwaves of microwave ovens are directional and the voltage is very high, while the radiation of WiFi is non-directional and the voltage is much lower.
This is like concentrating light to burn paper. When the sunlight is concentrated and irradiated on the paper, the paper will be ignited.
And wifi follows the inverse square law in physics.
This law means that when the distance is doubled, the energy will be reduced to a quarter, which means that the energy of wifi will rapidly decay as the distance increases.
So don’t believe the advertisements about wireless routers with ultra-wide coverage, because even if the power is increased, the signal will still decay quickly.
Actually compared to wifi radiation , mobile phones have a greater impact on the human body.
Because the mobile phone is usually very close to the brain. On the contrary, when using wifi, it can be used without being close to the router.
Experiments have shown that it only takes 20 minutes to make a phone call, and the radiation absorbed by the human body is far more than that of using WiFi for a year.
Judging from the above introduction, WiFi has really little impact on the human body, so you can use it with confidence.
But some friends say, no, technology is developing rapidly, and what is harmless now does not mean it will be harmless in the future.
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Is there any way to protect against wifi radiation?
A simple aluminum foil helmet can protect against the impact of wifi signals:
Method It's very simple. Just aluminum foil can achieve the effect of isolating WiFi radiation.
But it seems unrealistic to cover the entire room or house with aluminum foil, so the best way is to be like Magneto in the comics.Just make a radiation-proof helmet.
Of course, if you think wearing an aluminum foil helmet is a stupid idea, there are other materials to choose from.
Recently, a hat that can protect against radiation appeared on Kickstarter.
This stylish hat is made of special silver fiber. Just wearing this hat can effectively prevent the radiation caused by WiFi.
After talking about prevention and control, let’s talk about development.
In addition to allowing us to access the Internet, what else can wifi bring in the future? And who is most likely to be the successor to wifi in the future? Let’s take a look.
The wifi signal allows you to see clearly what the people behind the wall are doing:
Researchers at the MIT Artificial Intelligence Laboratory in the United States developed a software called emerald.
This software can use wifi signals to monitor indoor objects, somewhat similar to an x-ray machine.
Although this technology can be used in the VR field as a kind of somatosensory control after it matures, this software seems to easily leak personal privacy.
Is it possible for lifi to become a substitute for wifi:
In the south of France, the emergency room of a hospital called Pergignan began to use a device called lifi.
lifi is a visible light communication technology that transmits wireless communications through light.
The characteristic of this technology is that the transmission speed is faster than wifi , and because it does not rely on radio waves to transmit information, there will be no electromagnetic interference, which means that you can also use your mobile phone to access the Internet while flying.
Lifi also has the advantage of being safer because it is safer. Transmitted in light, data transmission is sent directly, so data is basically impossible to leak.
There are advantages and disadvantages. LiFi can currently only communicate in a single way.
That is to say, the signal is transmitted from the light bulb to the mobile phone, but the signal on the mobile phone cannot be turned back.
And Because it relies on visible light as a carrier, the range is also limited. Only with light can there be a signal. Without light, there is absolutely no signal.
The last thing to talk about is that although the wifi signal itself is harmless , but connect to strangers at willA weak WiFi signal may leak personal information.
So in general, wifi is not completely safe, so friends who often like to "crash the Internet" should be careful.
