LiFi may be a replacement for Wi-Fi.

LiFi may be a replacement for Wi-Fi.

The rise of mobile devices has brought Wi-Fi to thousands of households. In the near future, we may live in the "Ocean World" filled with Wi-Fi ". So we can't help wondering, is wi-fi really harmless? If not, how can we prevent the harm it brings?

 

The answer is the same as that of many people. Wi-Fi is harmless. But why? Take the microwave oven for a comparison. First, the Wi-Fi radiation intensity is 100,000 times weaker than that of the microwave oven. Secondly, microwave is oriented, and the voltage is very high. Wi-Fi radiation is not oriented, and the voltage is much lower. This is like concentrating on burning paper. The paper will be ignited when the sun is gathered and directed to the paper.

In addition, Wi-Fi follows the law of inverse square in physics. This law means that the distance is doubled, and the energy will be reduced to 1/4. That is to say, the Wi-Fi energy will quickly decrease as the distance increases. Therefore, do not trust the advertisement's wireless router with a wide coverage area, because even if the power is increased, the signal will fade quickly.

In fact, compared with Wi-Fi radiation, mobile phones have a greater impact on human body. Because mobile phones are usually very close to the brain, on the contrary, Wi-Fi can be used without having to attach a vro. It has been proved by experiments that it takes only 20 minutes to make a phone call, and the radiation absorbed by the human body is far more than the use of Wi-Fi for a year.

According to the above introduction, Wi-Fi has very little impact on the human body, so you can use it with confidence. However, some friends said, No, technology is developing rapidly. Currently, no harm means that it will be harmless in the future. Is there a way to defend against these Wi-Fi radiation?

A simple aluminum foil helmet can defend against the impact of Wi-Fi signals:

The method is simple. As long as the aluminum foil is used, Wi-Fi radiation can be isolated. However, it seems unrealistic to cover the entire room or house with aluminum foil, so the best way is to create a radiation-proof helmet like the ghost in the cartoon.

Of course, if you think wearing an aluminum foil helmet is a silly practice, there are other materials to choose from. Recently, the Kickstarter crowdfunding website saw a radiation-proof hat. This stylish hat is made of specially crafted silver fiber. You only need to wear this hat to effectively prevent the radiation from Wi-Fi. After talking about the prevention and control, let's talk about development. In addition to allowing us to access the Internet, what will Wi-Fi bring in the future? Who is most likely to become the successor of Wi-Fi in the future? Let's take a look.

Researchers at the MIT Artificial Intelligence Laboratory in the United States developed a software called Emerald. This software can use Wi-Fi signals to monitor indoor objects, which is a bit similar to x-ray machine. Although this technology can be used in the VR field as a kind of somatosensory control after maturity, it seems that this software can easily leak personal privacy.

Is LiFi a possible replacement for Wi-Fi:

In southern France, an emergency room named Pergignan hospital started using a device named LiFi. LiFi is a visible-light communication technology that transmits wireless communication through light. This technology features faster transmission speed than Wi-Fi, and it does not produce electromagnetic interference because it does not rely on radio waves to transmit information, that is to say, when you are on a plane, you can also use your mobile phone to access the Internet. Another advantage of LiFi is its security. Because it is transmitted in the light and data is directly transmitted, it is basically impossible to disclose data.

LiFi currently only supports single-item communication. That is to say, the signal intelligence is sent from the light bulb to the mobile phone, but the signal on the mobile phone cannot be converted back. In addition, because visible light is used as the carrier, the range is also limited. Only light can have a signal, and no signal is available without light.

The last point is that although the Wi-Fi signal itself is harmless, it may leak personal information if you connect to a strange Wi-Fi signal. In general, Wi-Fi is not completely secure, so friends who often like the Internet should be careful.