Chapter 869

The next afternoon.

Although heaven is not beautiful.

The scattered light snow last night has evolved into a flurry of snow.

Hoo!

But for Elvin, this is not a matter, just a slight wave, like a eraser, has covered the top of the head of a small half of the Principality of lead cloud.

Except for Anita and Livina.

He also led a group of witches from the public, including the "tree of life school", "mechanical immortality school" and witches, as well as engineering students and professors from the National University of Garriott, to a hillside in Long Island.

However, until the evening, the scheduled test time.

A group of electrical engineers, who have graduated from the Engineering Department of National University of Garriott, have finally finished the final debugging of the signal transmitting equipment at the far sail collar in great sweat, and sent the ready signal.

Elvin stood by and didn't step in.

In order to continue to copy and expand the trend of the electrical age, it is tolerable to sacrifice a little time for military training.

"Radio technology" is the technology of transmitting signals through radio waves. The principle is that the change of current strength in the conductor will produce radio waves.

Using this phenomenon, information can be loaded into radio waves by modulation technology.

When the radio wave propagates through space to the receiving end, the electromagnetic field changes caused by the radio wave will produce current in the conductor. Then the information is extracted from the current change by demodulation technology, and the purpose of information transmission is achieved.

This is a very practical and important branch of power science. Elvin from the information age knows the power behind it!

Dong!

Then Elvin took out a suitcase size, seemingly made of brass and walnut, and put it on the ground. This is an enlarged version of... Radio.

Radio wave length can be divided into long wave, medium wave, short wave, ultrashort wave and microwave.

Evans uses the amplitude modulated short wave broadcasting mode.

Because of the existence of "ionosphere" in the atmosphere of the planet.

Like a mirror, it can refract the radio waves emitted at the speed of light back to the earth's surface instead of going straight into space. It also enables radio stations far away to communicate with each other.

The "short wave" band can reflect stably in the ionosphere of the atmosphere.

Moreover, the short wave has strong penetration and is not easy to be interfered. After the signal is reflected by the ionosphere, it can spread to hundreds or even thousands of kilometers away.

Therefore, shortwave broadcasting is suitable for far area broadcasting, and even can be used as international broadcasting, which has high strategic value.

Even Evan's time and space is generally considered by engineers to be the most effective way to transmit information on a large scale around the world, safe, cheap and fast.

However, short wave broadcasting is mainly based on "sky wave" propagation. Due to the influence of atmospheric conditions, the propagation distance at night is much longer than that during the day.

Since it is the first test, of course, the most convenient conditions should be created.

Turn on the radio knob, there is only a low tone.

Ivan took a look at the time and whispered through the network:

"Hersey, the test begins."

At the same time.

Located on the top floor of juyebao of the aimore family in the south, next to the towering signal transmitting tower and special radio, there is already a black piano that looks expensive.

Wearing the same night starry one shoulder evening dress, revealing the slender neck and slender arms, mother and daughter of ninfu and Olivia have sat shoulder to shoulder at the piano.

At the same time, he raised his slender hand and gently touched the black and white key of ivory.

Dong!

In the eyes of Evan, who lives on Long Island, a radio wave breaks through the air, and then the moving piano melody rings on the radio.

Di Di Dong Dong

It's like a cool moonlight flowing quietly in the mountains.

It was the third piece of the Bergamo suite, moonlight, by music master Asher Claude.

In fact, when the first note sounds, it means that the first radio test in human history has been successful.

However, in the presence of witches, students and technicians, it seems that they have forgotten the original intention of this trip, including their sister and Livina, who closed their eyes slightly and reveled in the wonderful music.

A picture of silence and moonlight unfolded slowly in people's hearts. There is a picture in the song and a song in the picture. The song is a flowing space-time, and the picture is a solidified instant scene.

Ning Fu and Olivia before marriage are worthy of being the first lady of the noble family. Their artistic quality is impeccable, which has greatly improved the overall artistic level of the Garriott family.

Well, if they have.

At this point.

Even if there are thousands of kilometers between the two sides, the audience seems to be sitting at the piano, holding their breath and listening quietly, for fear of disturbing their performance.

It's too much of a show to be applauded.

This is probably the charm of the superposition of art and radio. The combination of the two has produced a general change of quality.

Even Evan, who is a review, is a little intoxicated.

Although there are many magic props that are more magical than radios, they are technological creations that can be copied infinitely with basic materials such as brass, steel, wood, etc.

The most terrible thing is not the radio itself, but the scale effect behind it.

The whole village, young and old, carrying their horses, surrounded by a box on the threshing ground, seemed to reappear in front of Elvin's eyes.

Then they rush to accept their own values and aspire to be loyal supporters of the "royal power".

In contrast, theaters, newspapers, concert halls, minstrels... With all kinds of inherent defects don't even deserve to carry shoes.

In addition.

There are no barriers at all.

If the short wave is replaced by microwave, and then the gulls of the "mind network" are used as relay stations, the signal strength can be rapidly improved and converted into ultra long-range high-quality military signals.

At the end of the song, the beautiful sound of the piano still reverberates in the night sky.

Pop! Pop! Pop

When I came back to myself, the flood of applause had annihilated the hillside, as well as nymph and Olivia who came out of the air hand in hand on the light butterfly.

Livina was the most excited.

A series of subversive activities in the lowland Republic have proved that:

"Media", as the medium of spreading information and the channel of exerting influence, plays a key role in shaping national soft power and international power.

"Discourse power" is truth, knowledge and power!

The influence of the birth of "radio broadcasting", a new media, is absolutely on top of several "gods of music and opera"!

Just then.

Whew! Whew! Whew! Whew!

Four streamers suddenly crossed the horizon.

Angie's excited voice rang out in Elvin's heart

"Teacher, I think you'd better have a look at this!"

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