After a breakfast.

The four of them decided to set off, and the destination was, of course, where Kahina's friend was.

That is, the Menke family.

The carriage traveled all the way.

After some time, they entered a famous square in the royal capital.

It's called Durang Street.

On this street, there is an industrial center in the royal capital, where many famous craftsmen, sculptors, and artists are located.

The area is quite vast and extremely lively.

A little further on, the gates of the Menke family are located.

Looking up, the gate in front of me was actually made of forbidden magic stones, connected by white stone pillars, and there were lines carved on them, which looked extremely magnificent.

Kahina walked in the front, pulled the rope at the door, and soon, a figure appeared.

Seeing that it was Kahina, he immediately bowed and saluted: "Miss Bouvier, what are you from?" ”

"I'm looking for Nevis, is she there?"

"Miss Navis should be here." As soon as the janitor raised his head, he saw Lu Qi standing behind Kahina, and felt a little familiar, and after taking a closer look, he hurriedly lowered his body again, and said respectfully again, "Hello, Your Royal Highness." ”

"Hmm."

Lucci replied.

When the janitor looked up again, he saw a girl with brilliant blond hair and a delicate and lovely face, and her head was lowered again.

It's just that when he lowered his head this time, he glanced at it by the way: "Miss Crown, Miss Laurent, two are good." ”

Open the door.

"You should know where Miss Navis is, and do you need me to show her way?"

The janitor asked.

"No need."

Kahina shook her head.

As the four of them walked into Menke's house, Lucci looked around.

I found that this Menke family is not only magnificent in the gate, but also quite magnificent inside.

A five-storey building stands at the heart of the estate, with which the complex spreads throughout the estate.

These styles are a little more modern.

And within a few steps of entering, there is a main courtyard, and in the middle of the main courtyard stands a white statue.

The statue is supposed to be carved according to Du Lang himself, a middle-aged man who looks polite and has no sense of strength, but has a kind face.

At this time, Kahina said: "There are five siblings in the direct line of the Menke family, and the Neves we are looking for is the daughter of the old lady Sheila. ”

On the way, Luci got to know this Nevis briefly from Kashina.

She is the daughter of Sheila, the youngest of the five sisters in the Menke family.

Sheila married an ordinary craftsman, and according to the rules of the aristocracy, Sheila should have been married.

But the common man, Navis's father, died not long after giving birth to Navis.

Sheila's mother brought them both back.

"My friend is a little withdrawn, I can't remember how long she hasn't been out."

Kahina said as she walked.

By this time, she had led the three of them to Nevis's residence.

Then he reached out and knocked on the door.

A weak voice immediately came from inside: "Who?" ”

"Me, Kahina."

"It's coming, wait a minute!"

Soon, there was the sound of chickens and dogs jumping in the room, then the sound of bare feet on the floor, and in a short time the door was opened.

The one who opened the door was a girl dressed in a slightly unsightly brown dress, with two whips tied at random, and two large round glasses that almost blocked half of her face.

She was barefoot, and these feet were very beautiful.

Behind him, there are flying pages, and the room looks disorganized.

This is Naviss.

It seemed that she didn't expect so many people to stand outside the door, and Navis was startled, and she wanted to close the door immediately, but she was blocked by Kahina, who had expected it.

Then he was forcibly propped up in a position.

Nevis's strength was clearly no match for her, and she had to get out of the way.

I hurriedly ran to put my shoes on.

After entering the house, Kahina pulled Lu Qi and the others to introduce them.

"Hello, Your Royal Highness."

Navis looked down at Lucky, and saluted.

Lu Qi looked at her, and didn't say anything for the time being, at this time, he vaguely felt something.

Seeing that Lu Qi didn't say anything, Naves kept her head down, maintained a salute posture, and didn't dare to move.

Seeing this, the three of Lux were a little puzzled.

Then I saw that Luqi circled around Navis, and after a circle, he suddenly reached out and took off her large round glasses very recklessly.

Nevis's face suddenly showed a panicked expression, extremely nervous.

After one look, he brought it back to Navis, and the nervous girl breathed a sigh of relief.

At this time, Lu Qi took one hand as a palm and the other as a fist, snapped, patted it, and his expression was relieved.

This strange behavior finally made Lux can't help but ask, "May I ask what kind of nerves are you doing?" ”

"Sure enough, a girl like this kind of soil-eyed girl wants a reversal."

Luffy answered the question in a self-muttering voice.

The moment he saw Navis, he had a faint feeling of it.

When I took off the big round glasses, I saw that a weak face with insufficient blood color, but very good-looking facial features, was revealed.

Isn't this a reversal!

Well, it's not really, because the room has a portrait of Nevis's mother, Sheila, when she was young, and it's obvious that she is a big beauty.

So as her daughter, it is difficult for Navis to see where to go.

Hearing Lu Qi's words to himself, the three girls were obviously speechless.

"How can you say a girl to your face."

Lux gave him a roll of the eye, as if she had a premonition of what Lucie was going to say next, and immediately added, "Not in the background!" ”

Lu Qi looked at her in surprise, he didn't expect this to be blocked for you.

Miss Crown, you are good at it!

"Look, you're clearly deluded."

In this regard, Lu Qi sighed, with a transparent expression, "You think I'm piercing her heart, but one day when she dresses up carefully, it will be you who will be slapped in the face." ”

Hearing this, Lux didn't bother to pay attention to him, and pulled Nevis away: "Don't care, he calls it intermittent nerves." ”

Hearing this, Nevis hurriedly waved her hand: "No, I don't care. ”

She really didn't care, after all, she wasn't one or two.

But this His Royal Highness the prince seems to be really strange.

Seeing that a few people really didn't care about themselves, Lu Qi shook his head and walked around the house casually.

He saw a lot of strange objects, and there was paper all over the floor, painted and melted.

After half a ring, he came to a conclusion.

Navis is supposed to be a polytechnic girl.

At this time, Luqi noticed something and picked it up, and it was two trumpet-shaped things with a line connected in between.

He picked it up and asked curiously, "What is this, Nevis?" ”

Naves, who was caught in the middle and forced to chat, subconsciously stood up when she heard Lu Qi's question, and replied nervously: "Back to Your Highness, that is the microphone I invented." ”

"Microphone?"

When Lux heard this, she also stood up curiously.

As she approached, Luci handed over one of the horns.

Lux took it, and then walked a few steps, to the farthest point of the line, about seven or eight meters.

Then she said to the horn, "Hey, can you hear me?" ”

Lu Qi didn't even need to raise his horn, looked at Lux on the other end and said, "Isn't this nonsense?" ”

So Lux couldn't help but ask blankly, "So what's the use of this microphone?" ”

The distance between her and Lu Qi can communicate normally.

Navis looked embarrassed and embarrassed, "So it's useless." ”

Luci turned his head and looked at the room full of gizmos, which seemed to be made by Navis, and looked like they were useless.

"So you've been at home for so long, and you've researched some scrap?"

He said.

Hearing this, Navis lowered her head and said weakly, "Yes." ”

Although it was sad to be said to be scrapped this time, I have to admit that what Lu Qi said was the truth.

Lu Qi then added, "Actually, I think you just think too much. ”

Unexpectedly, Lu Qi still had a follow-up, and Navis raised her head, as if she was a little puzzled.

"You don't seem to be focusing on one thing."

Luci picked up the paper on the ground and looked at it, there were several things recorded on the paper, but the dates of these were not far away.

This shows that Navis researched an object, and when she found it useless, she gave it up and put her mind on the next one.

Because of this, she didn't come up with a useful invention.

Hearing this, Navis lowered her head in shame.

Lu Qi looked around, and actually found some small inventions that would definitely be useful if he continued to study.

However, Navis didn't stick to it.

"Like this, microphone, do you know why sound can travel between two horns?"

"Because, there is a medium of communication between them."

Navis replied subconsciously.

"Yes," Luci continued, "the rope is the medium through which sound travels, but have you found that when you go beyond a certain distance, the sound cannot be conveyed? ”

Nevis nodded, her few attempts had resulted in this.

"Because, when the distance is long, there is a lot of interference in the propagation of sound." Luffy played with the horn in his hand and asked, "Do you know how sound travels?" ”

Faced with this question, Nevith thought for a moment and replied, "I think that sound transmission must require some kind of substance. ”

She could vaguely answer.

Surprised, Luci added, "Yes, what is needed for sound to travel through the air is a substance, and I use it as a medium. ”

At this time, Kahina, Lux, and Fiona sat on the side, looking at the two people who were talking, and suddenly felt a little unable to fit in.

"Media?"

For the first time, Navis was at a loss.

Lu Qi said: "There are many kinds of media, objects, gases and even liquids, etc., have you ever tried it, can sound be transmitted in an environment without air?" ”

Nevis shook her head.

"I'll tell you the answer directly, sound can't travel in a vacuum. It can only be transmitted through a medium, which is also present in the air we breathe. ”

Lu Qi said, breathing a sigh of relief and asking, "Do you now know why sound can't be transmitted beyond a certain distance?" ”

Nevis thought for a moment and replied, "Because, the influence of the medium is not enough?" That is, the rope cannot carry the function of sound propagating longer distances. ”

Lux, Kashina, Fiona: (⊙⊙)

Completely incomprehensible, they tilted their heads and began to wander into the world.

"Then you know that the sound has a high and a bottom, and this high and low, through what?"

"What?"

"Vibration."

Chatting and chatting, a glimmer of brilliance gradually appeared in Navis's eyes under her large round glasses.

"You can think of sound as ripples on the surface of water, and the greater the amplitude of the vibration as the sound travels, the louder it will be."

"In other words, the reason why the microphone cannot transmit sound beyond a certain distance is also due to the insufficient amplitude of vibration?"

"Not bad."

Seeing that Nevis's expression was already a little abrupt, Lu Qi was still quite satisfied, this Nizi has some talent.

So, he said something more.

At the same time, it also answered Navis's puzzlement.

Thirty minutes later.

"That's pretty much it, do you understand?"

Lu Qi's mouth was dry, and of course he couldn't explain it class by class like a college course.

I can only tell my own mastery and understanding in the simplest way.

For example, in the later era of electronic, I simply didn't talk about it.

If you continue to talk about it, it will be an episode into science.

At this time, the sensible Kahina poured a glass of water for Luqi and sent it over.

Luki took a sip and looked at Navis, who seemed to be still processing the information.

"I see!"

Nevis suddenly raised her head, and the voice she made unconsciously became louder, revealing an expression of sudden realization, "If you go beyond a large range, the sound must not be able to transmit, because the medium is not enough, and the sound will dissipate in the process."

Even if I wrap it in copper tubes, it won't work to minimize the sound spread. ”

She began to deduce herself, stood up, and took a book from the shelf, flipping through it at a rapid pace, page after page.

One wonders if she even saw the contents of that page.

Finally, she stopped at a page and looked at the content: "However, the normal method does not work, and this is fine." ”

Lucci stepped forward and took a look, and above it was a shell that circled around it.

"The shell of the triangle crab is a very strong shell, and people usually use it to make simple tools." "However, this shell can also be used as a medium for sound transmission, and if it can contain sound, it will definitely be able to transmit it."

Halfway through the sound is transmitted, it is retained, and when it is transmitted again, it will not be affected, it can continue to propagate, and the vibration amplitude will be increased twice as the sound passes through the shell. ”

At this point, there was no need for Lu Qi to say anything.

Nevis's heart already had the answer, and her eyes lit up completely: "Then you don't have to worry, the sound is halfway through, and the medium and vibration are not enough!" ”

Lu Qi looked at the girl in front of him who was asking and answering herself.

I can't help but sigh. Talented.

Nevis, maybe a genius.

It's a pity that I was born in the wrong place, and if I had been born in Piltover, I think the future would be bright.

Piltover is known as the City of Evolution, home to many outstanding inventors and arguably at the forefront of Runeterra's technology.

However, Demacia rarely interacted with Pit, almost none.

Otherwise, Debang's industrial level can make further progress.

(End of chapter)