Chapter 229: I see you, just like a mayfly seeing the sky

"Sound waves? Light waves?"

Inside the room, the priests who were listening intently fell into a moment of confusion.

One of the priests asked doubtfully, "Your Excellency said water waves, and we all understand that, but does this sound also have waves?"

Zhao Duan smiled slightly and said firmly:

"Of course. In fact, water waves and sound waves are the same."

He then picked up the pen in his hand and knocked it on the bookshelf next to him, making a "bang" sound:

"Look, how does the sound appear? It's the collision of the pen and the bookshelf that creates the vibration, and that produces the sound. If you throw a stone into a pool of water, won't the water surface also vibrate and make a sound?"

In a world severely lacking in relevant concepts.

When Zhao Duan explains something, he must abandon rigor and pursue simplicity and understanding.

Sure enough, as soon as these words were spoken, the priests inside and outside the room suddenly understood and felt that they made a lot of sense.

Gongshu Tianyuan nodded vigorously and said seriously:

"What you said makes sense. Just like if the drum is covered with dust, if we hit it hard, the dust on the drum skin will vibrate like water waves."

After a pause, he frowned:

"But, for this sound to travel from one place to another, does it need any medium to transmit it?"

"Haha, Brother Gongshu's observations are meticulous and his metaphors are vivid," Zhao Duan praised him first, then said:

"Of course. Well, for example, last time I led the troops to capture a wanted warlock.

Well, Priest Jin Jian was there at the time. He believed in the God of Wind, and during the fight, he actually sucked the air out of me, suffocating me.

At that time, I called out to Priest Jin Jian for help, but I found that we couldn't hear each other."

Outside the room.

A priest excitedly echoed:

"Yes, there is such a technique. I have encountered it myself and was unable to make a sound. But I don't know why."

"So, does that mean that the 'medium' required for sound to propagate is air? If the air is drained away, sound cannot be transmitted."

Everyone was discussing that most of the priests here were not gods of craftsmanship.

But it doesn't stop them from listening and participating in the discussion.

Zhao Duan smiled and nodded:

"You are right. Similarly, water waves exist because water itself is the medium of those waves."

The short and fat young man Gongshu Tianyuan frowned:

"Your Excellency is right, but what about the light waves? They can still see each other clearly even though they have removed the air. This means that light doesn't rely on air to spread. So what does it rely on?"

Oops... I think I said it out of turn. Does light need a medium to propagate? It seems that it doesn't need one at all...

Well, unless the concept of "ether" is brought out... Alas, there is no way, this knowledge has been useless for too many years, and I will return it to the teacher after I start working...

Zhao Duan choked and realized that he seemed to have said something wrong.

However, Lord Zhao is a man who has been tested many times. Although he feels nervous in his heart, he still looks calm.

He even showed an expression of admiration for the past and said with emotion:

"Brother Gongshu is indeed a disciple of the Heavenly Master. He hits the nail on the head with just a casual question!"

Gongshu Tianyuan couldn't help but straighten his chest and feel proud.

Zhao Duan coughed lightly and said seriously:

"To explain this, we must first clarify what light and light waves are. In my opinion, everything in the world is composed of a kind of elementary particles, just like a piece of stone, which, when crushed, is revealed to be just grains of dust...

So is water, so is light... because it is made up of particles.

Particles are disturbed by external forces at all times, just like dust moving in the wind. Particles influence and interact with each other, forming light waves..."

Zhao Duan felt a little guilty when he said this.

Because according to the concept of wave-particle duality he remembered, light itself is both a particle and a probability wave...

But this thing is too abstract, and it also involves the concept of "field"... He is not an expert in this field, and he only has a superficial understanding of it.

So after some hesitation, I decided to explain it in a more understandable way...

Anyway, it's too abstract and these people can't understand it at all.

It's also too advanced and unnecessary.

…

In the small courtyard.

Xu Zhenguan looked at the water curtain with a strange expression while Zhao Duan talked freely.

I couldn't help but turn my head and look at the old Taoist priest:

"Is everything in the world really made of 'dust'?"

Zhang Yan was silent for a moment and did not comment.

Just vaguely said:

"Haha, the mysteries of heaven and earth, how can mortals fathom them? However, what this person said is indeed an interesting hypothesis."

The old Taoist priest seemed calm, but he was actually also confused.

According to Taoist doctrine, the universe is composed of yin and yang qi and the five elements... But Zhao Duan went a step further and broke down both qi and the five elements into particles...

If someone else had said this, Zhang Yan would have just laughed it off.

After all, there is no shortage of lunatics in the world.

But the person who said it was Zhao Duan, who could always express extremely insightful views...the old Taoist priest was a little unsure.

"Let's see how he continues." Zhang Yan said.

Xu Zhenguan nodded and turned his gaze to the water curtain again.

…

In the room.

Zhao Duan cleared his throat and said with a smile:

"Having discussed the appearance of light, we now move on to the topic of how light travels through a medium. Unfortunately, I cannot give an answer to this question, and I am still exploring."

When these words were spoken, many priests were in a commotion and discussed the matter.

However, Gongshu Tianyuan's small mung bean-like eyes became brighter and brighter.

He rebuked the discussion in a deep voice and said seriously:

"We cultivators of the Dao also have countless mysteries to uncover. How can we possibly understand everything? Your Excellency is the character and integrity that a seeker of the Dao should possess!"

A group of priests were immediately ashamed and looked at Zhao Duan with more respect.

Gongshu Tianyuan's fat face was filled with excitement:

"Your Excellency, please ignore them. Please continue speaking! Speak quickly!"

He realized that the next thing he would do was to understand the principle of refraction that had been bothering him for days.

Zhao Duan smiled and nodded, saying:

"Having explained all of this, we should understand that the air-filled space and the suffocating underwater world are two different mediums. How many of you have ever gone fishing by the river?"

Fishing?

Many priests immediately spoke up, saying that they had experiences.

Zhao Duan stood with his hands behind his back and said:

"Experienced fishermen know that when we stand in a stream, holding a sharpened stick, and stab a fish swimming in the water, we must not aim straight, but rather point it downwards to hit it. Why do you think that is?"

"this……"

The priests looked at each other, and one of them's eyes lit up:

"Could it be that because the medium is different, the image cast by the light is misaligned?"

"That's right!" Zhao Duan praised, "That's the truth."

He used diagrams on the small whiteboard to explain a series of things, and then said:

"This principle is actually familiar to you all. When you're tired from staying up late and yawn, do you shed tears? What happens then?"

Gongshu Tianyuan suddenly slammed the table, stood up excitedly, and said:

"Clear! Things far away are clearer! I understand! Tears covering my eyes are like light entering a stream, and the images I see are like fish swimming in the water..."

At this moment, the descendant of the God of Craftsman was excited.

The brain is working fast.

The problem that had troubled me for three days and three nights suddenly became clear, and I murmured:

"So, using crystal to polish a mirror is like placing a special layer of water in front of a person's eyes at all times... and adjusting the light beam through calculation..."

"Wait, then why are human eyes like this? Could it be that the human eye is also like a pool of water? Just as legs and feet become deformed when injured, the human eye also becomes deformed... This is why the vision is blurred..."

"Haha, I get it! I get it!"

At this moment, Gongshu Tianyuan kept muttering to himself.

Not sleeping for several days in a row and frantically straining his brain cells had already made him emotionally unstable and in a trance.

This would suddenly break free from the shackles and make him almost dance with joy.

The other priests all looked at him sideways.

"Senior Brother Gongshu has gone crazy again. The last time he was like this was a few years ago..."

"What did you understand, Brother? Why do I still not understand?"

"Where on earth did Zhao Duan learn this skill? He could make Senior Brother do this with just a few words..."

The crowd was talking.

Zhao Duan was also very surprised, because this fat man's comprehension was a bit amazing.

After all, he had forgotten most of this knowledge, and only remembered the general idea of ​​lenses and the like.

So, what he talked about were mostly conceptual things.

And I am not even sure whether what I said is right.

But true genius does not need careful teaching.

Just give him a direction and a little inspiration, and he will complete everything by himself.

Gongshu Tianyuan, who inherited the legacy of the God of Craftsmen, is of course an extremely talented person.

It’s just that science is severely suppressed in this era.

At this moment, Zhao Duan's simple conceptual words were like a fog, confusing the other priests.

But to Gongshu Tianyuan, it was like a sharp axe, splitting the thick fog before his eyes.

Just like a mayfly seeing the blue sky.

"Brother Zhao!"

Gongshu Tianyuan restrained his smile.

He strode forward, grasped his hand with both hands, and shook it sincerely, his fat face flushed:

“Listening to your words is better than listening to my master countless times!

This is the direction I've been striving for. Previously, when I created those talismans, I mostly relied on magic. But what Brother Zhao said today has nothing to do with magic, but rather the true meaning of the God of Craftsmanship."

"...Brother Gongshu, you're too kind. The Heavenly Master is a very important figure. I've only been speculating about him daily, and after reading some random books, I've made my own assumptions. They're not to be trusted, haha, not to be trusted..."

Zhao Duan smiled stiffly and tried to pull his hand back.

I just said a few words casually, and the effect far exceeded my expectations.

Gongshu Tianyuan also realized that he had spoken out of turn in his excitement, and hurriedly tried to find a few more words before saying:

"Anyway, what Brother Zhao said today is thought-provoking. If you need anything from me in the future, feel free to come and ask for my help. Hey, do you need any talismans? For example, this paper skirt could be used for the women in your family..."

“…No need!”

Zhao Duan glanced at the shelves and saw a large number of strange magical instruments with bizarre functions. He shook his head and refused righteously.

"Alright, I've kept you busy for a while, but please don't upset His Majesty. Brother Zhao, please get back to your work. I still need to digest what you taught me today."

Gongshu Tianyuan looked regretful.

There is a sense of loss that your treasure is not appreciated by others.

"In that case, I'll take my leave first." Zhao Duan said with a smile.

For him, gaining this network is the greatest gain.

…

A moment later.

Zhao Duan hurried back to the hall where the palace guards gathered.

Then, the empress in a light gauze Taoist robe slowly walked out from the three gates, and the waiters stood up to greet her.

"Your Majesty? Have you finished talking to the Heavenly Master?" Zhao Duan was stunned.

Xu Zhenguan nodded slightly, staring at him with extremely complicated eyes.

He wanted to say something, but he didn't say anything. He walked out and said lightly:

"Return to the palace."

…

Help catch typos

(End of this chapter)