Twenty-six years of Yuan Heng.

Li Chong got some rubber from Li Zhi.

In the winter of this year, after taking a look at Li Er, and living in the annex in Zhaoling for half a month, Li Chong returned to Luoyang and began to study the microphone, speakers, and vinyl record phonograph.

No way, it's so boring.

I can only find something to do for myself.

Although, these things don't seem to have much effect on governing the country.

On the contrary, in terms of vocal music, it may have some advantages.

But it should be done, and it still needs to be done.

Meanwhile......

He also wants to use this example to tell everyone about the difference between theoretical science and applied science.

Other than that......

Li Zhong felt that next, Datang should also set up an award.

For example, the top three people who study theoretical science will be rewarded with a large mansion and slaves.

The same is true for applied science.

Why is it all of a sudden so clear?

It is Li Chong who worries that one day, future generations will only focus on application and not theory.

It only took a month for Li Chong to complete this thing.

Because this thing didn't suddenly want to be done, but Li Chong had been preparing for many years before.

At least, it should be more than ten or twenty years.

After Li Zhong made this thing, even the widow girl who was wearing a pink cherry blossom dress and her legs were white over-the-knee innocent little Lori necessary stockings were stunned.

In fact......

This widow's dress is a little too advanced.

But......

It doesn't seem to be a little ahead of its time, and it doesn't look very good.

Anyway......

Li Chong felt that they were neither suitable for wearing the Japanese Kingdom nor the Tang Dynasty.

Simply......

Let them wear what they haven't worn before.

"That's it!"

After finally being able to use the current to make a sound and be able to transmit a certain distance, Li Chong's heart finally let go of another burden.

Subsequently......

So he took the widow girl on the side, hugged him in front of him, and enjoyed each other well.

The widows were also very cooperative.

After all......

It's a win-win, so why not.

Followed by......

He brought her little mouth up.

But there's one thing to say......

Li Chong never explained to them what he was doing.

The communication with them is also more of a physical communication, which also leads to the fact that they will also think wildly from time to time, what is the meaning of their existence?

All I can say is......

The reason why they were able to come up with such ideas shows how good Li Chong is to them.

Only those who are well fed and supported will have such an idea.

The microphone, the speaker, and the vinyl record phonograph were all worked out.

Li Chong can also be published in the Science Newspaper next.

It seems that Li Chong has not published his own article in the Science Newspaper for a long time.

To this end......

On the side of the Academy of Sciences, Li Chunfeng's son, Li Yan, is already gray-haired this year, and he also attaches great importance to Li Chong's articles.

And......

This article is really well written, and it can only be said that usually even they don't notice that there is a distinction between theoretical science and applied science.

As for the microphones, speakers, and 'vinyl' gramophones invented by Li Chong.

In fact......

These inventions are secondary to the insights in the article.

After reading it, Dang even gave Li Chong a front page of the Science Newspaper.

Afterwards......

This article and the actual object were quickly distributed, and it was also displayed in front of everyone.

Li Chong felt ......

The reason why he couldn't develop things related to electricity was because he only knew the final product of applied science related to electricity, but he did not understand the theoretical science related to electricity very well.

】

And electromagnetic waves!

That's what really works!

Li Chong also wants to make radio, but the problem is that his knowledge of radio is almost equal to zero.

In my head, I guess all I have is some hertz, some hertz, and some ore radio.

He knew there was such a thing as an ore radio.

All I can say is......

It should be called this name. But how this thing was made, what the historical background story was, he didn't know anything about this.

The main thing is, in the past, I was interested in gunpowder and tofu, such as radio, right, because it was too profound, he generally only listened to the author's blowing, and no longer delved into whether the author could blow it or not, because it was too profound, he didn't want to compare with the author, and naturally, in the end, he lacked knowledge reserves in this area.

Let's be honest!

It's a bit of a shame!

But......

This is also the reason why Li is important to put forward theoretical science and applied science.

The reason why this radio can be used is that it must be based on relevant theoretical science.

And where does theoretical science come from, most of it, it should be said that it comes from the observation of the real world.

For example, if you observe a very strange phenomenon, then study the theory behind it, and finally, by integrating the resources and knowledge of all parties, you can develop scientific applications that are beneficial to human beings.

Of course!

Sometimes, even if you don't understand the theory behind it, you can still reach the level of application.

But if you want to apply it better and with higher efficiency, then this theory still needs to be carefully studied and studied.

And the theory used in the microphone and speaker is nothing more than the principle of sound production, and then, there are also theories related to magnetism and electricity.

Twenty-seven years of Yuan Heng.

The first day of February.

After reading Li Chong's article, everyone kept praising Li Chong - they could only say ...... The first president of this academy of sciences is the first president, and the articles written are at least one grade higher than others.

For them, they just need to invent things like microphones and speakers.

And what about Li Chong?

I made these just to add an illustrative picture to the courseware ppt for my class.

This is the huge gap between them and Li Chong in terms of level.

Speaking of this picture.

Li Chong, on his side, was also very interested in the camera.

Crucially, he still knows some of the principles of the camera.

Merely......

He had forgotten about the drugs.

It seems that the difference in light sensitivity of different materials is used, and then the redox reaction is used to develop the photo.

However, this method can only make a photo of a dead person, that is, a black and white photo.

Sometimes......

Li Zhong couldn't help but think.

It would be great if we could develop televisions and cameras in this era.