Electromagnetic waves have those applications in life

The main thing is communication.

Radio & Television:

Radio and television are conducted using electromagnetic waves. In radio broadcasting, sound signals are converted into electrical signals, which are then carried out into the surrounding space by electromagnetic waves that oscillate at high frequencies. In another place, people use the receiver to receive these electromagnetic waves, and then the electrical signal in it is restored into a sound signal, which is the general process of wireless broadcasting, and in television, in addition to processing the sound signal as in wireless broadcasting, it is necessary to convert the optical signal of the image into an electrical signal, and then these two signals are transmitted together by the electromagnetic wave of high-frequency oscillation to the surrounding space, and the television receiver receives these electromagnetic waves and restores the electrical signal into a sound signal and an optical signal. This shows the picture of the TV and the sound in the speakers.

The frequency and range of electromagnetic waves used in radio broadcasting are very high, whereas the frequency and range of electromagnetic waves used in television are higher and larger.

Mobile phone communication.

Wireless telegraph (radio).

Radio, medium wave, short wave, FM radio.

TV signal. satellite signals;

Navigation remote control. Locate home appliances (microwave ovens, induction cookers).

Infrared waves, industrial, medical, all kinds of electromagnetic waves.

Applications of Electromagnetic Waves:

Electromagnetic waves are widely used in radio and television, where sound signals are first converted into electrical signals, and then these signals are carried by high-frequency oscillating electromagnetic waves into the surrounding space. At another location, the receiver receives these electromagnetic waves and restores them into sound signals.

Electromagnetic waves are also used in the specific electromagnetic spectrum, when the human body matches and receives, it resonates with the same substances contained in the cells in the body, so it can enhance the microcirculation, promote metabolism, and produce the repair of human lesions, so that patients can quickly improve their own resistance.

In addition, electromagnetic waves are also used in mobile phone communication, satellite signals, navigation, remote control, positioning, microwave ovens, induction cookers, infrared waves, industry, medical equipment, etc.

Electromagnetic waves are calculated by the formula:

The wave velocity of an electromagnetic wave in a vacuum is c, which is equal to the product of the wavelength and frequency f, expressed by the formula c = f, where c is the speed of the wave (the speed of light is a constant, about 3 10 8m s in a vacuum) is measured in meters per second.

F is the frequency, the unit is hertz, and the letter is Hz, but the commonly used units are kilohertz (khz) and megahertz (MHz). The conversion formula is 1MHz=1000KHz=1 10 6Hz. Whereas, refers to the wavelength, which is measured in meters.

Junior High School Physics "Applications of Electromagnetic Waves".

The most important and most frequently used is of course used for communication, such as mobile phone signals, which are electromagnetic waves.

There are also military aspects, such as radar, etc., so there is no need to talk about this.

Then it is used for detection, such as the detection of oil with electromagnetic waves, which is also commonly used.

Of course, the household is an induction cooker, and microwave medical treatment, which is also relatively hot now, and microwave energy transmission (this is also a topic of my research).

In short, the use of microwaves has gone overseas, you can borrow a book on microwaves casually, and the preface must talk about this.

There are still many applications of electromagnetic waves in life. For example, it is widely used in communication, medical applications, and food. The microwave oven we use for hot rice also uses the principle of electromagnetic waves.

Electromagnetic waves have brought a lot of benefits to people in daily life, and people's quality of life has also been greatly improved.

Electromagnetic waves play a particularly important role in radio communications. We watch TV because of electromagnetic waves. In radio broadcasting, people convert their sounds into electrical signals, which are then carried by electromagnetic waves around.

In another location, the reverse process was forbidden, which was to convert the electrical signal in the electromagnetic wave into the previous sound signal. That's what we watch on TV, but it's something more than radio broadcasting, and that's the light signal of the image. In the beginning, the sound signal is converted into an electrical signal along with the light signal of the image, and then converted back again.

This is what we see as television. It also has great applications in the medical field. These medical devices are mainly distributed with specific electromagnetic waves, and when the cells in the body receive electromagnetic waves of the same wavelength, they can repair the lesions that have been produced by the human body.

Of course, nothing is perfect, there are two sides, there are its advantages and its disadvantages. The human body itself is a weak electromagnetic field. It exists in a stable and orderly way in nature, and once it is disturbed by some electromagnetic waves, then this balance will be broken, which will have a great impact on the human body.

The ultraviolet rays in the sun are very harmful to the human body. Although a small amount of ultraviolet rays can play a bactericidal role on the human body, a large amount of ultraviolet rays can easily cause cancer.

The scope of electromagnetic waves in people's lives is still very wide. With its advantages comes its disadvantages. Nowadays, people are studying them more deeply, bringing more convenience to our lives. Let people's quality of life be improved even more.

Electromagnetic waves have a very wide range of applications in human life, the radio stations we usually listen to are transmitted by electromagnetic waves, some televisions are also, in addition, infrared, thermal imagers, etc. will use electromagnetic waves.

One is a kettle and the other is an induction cooker, these two applications have the widest range in life. Compared with traditional fire, electromagnetic heating has the characteristics of environmental protection and cleanliness, and it is still very practical and convenient.

First of all, light is an electromagnetic wave of a certain frequency. There is a lot of light in our lives. And then the broadband and wireless networks we use are actually a kind of electromagnetic waves.

Electromagnetic waves can be used for communication positioning and detection, radio broadcasting and television are from electromagnetic waves, microwaves are used for microwave ovens, infrared rays are used to control missiles, ultraviolet rays are used for disinfection, etc.