Saturday , June 12 2021

Electromagnetism: What is it and how does it change our lives?

Excerpt from publication:

Our ears listen to frequencies from 20 hrs to 20 pounds. With age, hearing deteriorates, so adults usually listen to up to 14 kilohertz. And here, for example, rats listen much better than us: from thousands of heroes up to 50 pounds.

Radio waves start from hundreds of kilotts. Medium – from 500 to 1,000 – currently little use of radio stations. Below are short waves. 3000 kHz to 30 megahertz. Mega means a million. Even more – ultra-short wavelengths. There are many telecommunication signals. They reach up to a hundred kilometers. That's enough, it's better than a big powerful transmitter. We have this in Sitkunai. He covered the whole country with a very interesting frequency. Some may say satanic. 666 kilograms.

Even higher (30 to 300 MHz) radio waves are used to communicate the crew with dispatchers, signals from various security services.

Next, TV signals from 300 to 800 MHz are already broadcast. This is called desymmetric waves. An even higher frequency is already a mobile connection. 900-1800 MHz. And here is 20 thousand kilometers of GPS data transmitted at 1500 MHz. What we call Wi-Fi and Bluetooth is the wavelength of 2400 MHz.

As the amount of data transmitted increases, higher frequencies should be accumulated. There is now widespread debate about the future 5G connection, which is up to 5000 MHz. There, as it is said, there will be room. Fully different distribution principles.

All these higher frequency signals are also referred to as microwaves. This is an old, but still used term. The microwave also uses radio waves, but the essence is the signal strength. The thermal effect is extracted with one and a half kilowatts of power at about 2400 MHz microwaves. This is how water molecules, consisting of positive and negative ions, extend in opposite directions.

Meanwhile, the power of the mobile device is just one power. No thermal effects on the body. We made an experiment with a phone and a piece of meat. He warmed up after a while, but then we realized that it was from the telephone battery, not from the antenna.

But let's go back to the question that has ever been asked by Hercules: what is the benefit? The answer is obvious. The practical use of these discoveries is universal and vital. One of the most modern and exciting features is the introduction of a modern train train in Shanghai, China. The 430-kilometer-long train does not have wheels, supports it in the air and pushes electromagnets forward. This is no longer a vision for the future, but an ongoing project.

See the whole cable here:

Source link