Become the city lord from today

"Of course, I have been translating this book for so long just for you."Liu Feng nodded.

Originally, only the people in the scientific research department could make full use of this physics book. If you don't give it to them, you can't give it to others.

The school can't learn such advanced things. It should be said that it can't be learned in a short time. Come.

In a short period of time, most students study junior high school physics. Just junior high school physics is enough for them to study for one or two years.

Not to mention high school and college. These make them want to break their heads. This is why The reason why the school cycle is very long.

The reason why they are asked to learn slowly is to let them slowly consolidate the knowledge they have learned.

After all, this is complex knowledge. Unless they are born with natural learning geniuses, they must learn slowly. digestion

"The content of this book is really useful, something we have never seen before."An old man said excitedly.

His wrinkled hands were always trembling, and he turned the pages carefully for fear of damaging the book.

"Can you make a home phone with this book?"The eyes of the other old man can be felt to be shining.

They originally looked very calm. To put it bluntly, they were lifeless, without any vitality at all. It was probably because of their age.

But after they saw this book It was different after that. In an instant, it was like everything came to life.

"You should take it back and take a good look at it first. It will be helpful for you to make a home phone. Liu Feng waved his hand

"Thank you, Your Majesty."The group of old men said in unison again.

They were all secretly fighting for the book. It doesn't mean that whoever gets it will get it, but they all want to look more dignified by holding it in their hands.

There is also a second option. Read this book at once to see what is actually written in the book.

"You go back first. I will give you another drawing later. You can slow down the production of the home phone and help me make the contents on the drawing first. Liu Feng ordered

"yes."The old men began to look forward to it, wondering what kind of drawings His Majesty would give them.

"Tap tap tap......"

The group of old men left the living room while scrambling for the book. They no longer had the calm feeling of the past. The scene now looked like children scrambling for candy.

Enri watched the group of old people leave and asked curiously,"Your Majesty, I haven't seen what you are drawing recently? What drawings do you want to give them?" The fox-eared girl flicked her brown tail. She has been doing this recently. I spent a lot of time with His Majesty over the past few days, and I really didn’t see any other drawings.

"This is something I came up with on the spur of the moment today, something that will allow us to have music to listen to in the future."Liu Feng smiled slightly.

This was something he saw when he traveled back to the earth last time. He thought that this kind of thing could also be presented in another world.

This kind of thing is a record, of course it is not put into a DVD player. records, which cannot be produced at the moment

"But don’t we just have music to listen to now?"Enri still doesn't understand.

"What I'm talking about is a record, which can help us lock the music in a record forever, so that we can listen to it anytime we want. Liu

Feng picked up the teacup and continued,"This way we don't have to ask people to come over and sing every day.""

Of course, the highest building didn't ask people to come over to sing. It was just a metaphor.

Anne and Agnes both had their own work to do, so how could they be called over to sing every day?

"Locking music inside a record?"Enri was particularly confused.

Mina also walked over with her head tilted and asked curiously,"Your Majesty, did you think of something else?"

The only thing that is difficult for Cat-Ear Girl to guess is this. Other than thinking that His Majesty has come up with a new invention, I don't know what to say.

Locking music in a record sounds very unreliable. What's more, I don't know anything about records.

"Have I told you before that sound is produced by vibrations?"Liu Feng asked back.

In fact, what he was talking about was how people hear sounds. What he explained to the beast-eared girl was all the content in physics books.

He also used the sound of drums as an example to explain. When the drummer When the drum surface vibrates, the vibration of the drum surface causes the air around the drum surface to continuously rise and fall, forming air fluctuations. The air fluctuations are transmitted to people's ears, which is the sound people hear.

This kind of air fluctuations, Liu Feng calls it"sound wave". The vibration generated by the sound source continuously causes the surrounding air to fluctuate.

This fluctuation will spread at a speed of 340 meters per second, which is similar to the water ripples formed by throwing a stone into the calm water surface. It's the same principle. What

Liu Feng explained is that sound can be transmitted through solid, liquid, gas and other media.

Anyway, when he was teaching this knowledge to the girls, he also conducted many experiments before they understood it. principle

"Your Majesty said it, but does this principle have anything to do with records?"Anli asked curiously

"Well, we can build a machine and use the vibration of the machine to imprint the sound on a piece of glass, thus forming lines on the surface of the glass. Liu

Feng took a sip of tea and continued,"In this way, we can also make a phonograph and put this carved glass on the gramophone. In this way, we can save and play the sound."......"

This was also a temporary solution he came up with, but he didn't know whether it would work or not.

All records on the other side of the earth are made of plastic, but he doesn't want to produce plastic in this era.

I came up with the idea of ​​using glass to replace plastic records, and if glass is stored properly, it can be stored longer than plastic.

"What Your Majesty said is so complicated, that is, we need to develop a machine that can convert sound into vibrations, right?"Enri condensed it.

"That's pretty much it. Only by converting sound into vibration can the vibrating machine leave scratches on the glass. Liu

Feng put down the tea cup and continued to ask,"Since this scratch is caused by sound vibration, what will happen if this record is placed on the gramophone?""

"His Majesty said that sound is produced by vibration. This gramophone will definitely vibrate. Put the scratched record on top of the gramophone......."

Enri frowned in thought and continued,"Your Majesty, if this is done, the gramophone will be able to produce pre-recorded sounds, right?" The fox-eared lady didn't know if her guess was correct or not, she relied on her own understanding to guess.

"very smart. Liu Feng smiled with satisfaction.

"Second update,(￣▽￣)Please customize and support."