Han Dao world

Chapter 1110 A Secret

Seeing that Liu Xie was interested, Yuan Heng said a few more words.

"Since His Majesty demonstrated it last time, this glazed mirror has been the hottest topic recently." Yuan Heng said with a smile: "Some people think it's interesting and use it as a toy. Some people think it contains the most reasonable truth and try to figure it out day and night. Some people think it's rich in business opportunities. Find ways to study methods and improve the quality. Even a few words of Western Region classics related to Liuli will be studied carefully, let alone such an important discovery by the nobleman."

"Is this... really important?" Lu Xiaohuan felt a little unsure.

"The nobleman is dedicated to martial arts and has no other distractions. Naturally, he is not interested in paying attention to these small arts. But there are also great ways in the small arts. For example, glass beads are not uncommon, but few people can pay attention to the truth behind the change of light and shadow like His Majesty, and then Evolved the wonderful use of telescopes and magnifying glasses."

When mentioning Liu Xie, Lu Xiaohuan didn't dare to offend him in the slightest, and nodded in agreement, feeling a little more ashamed.

Liu Xie didn't want to listen to these hidden Ji Feng's words, so he interrupted Yuan Heng. "How many people study the classics of the Western Regions? What content do they study?"

"It's mainly the glass-making method of the Western Regions. However, there are also some people who are ingenious and work hard on mathematics. For example, Cai Lingshi has recently been studying the relationship between shape and refraction and reflection."

"Oh, what's the result?"

"This minister is not clear. She has a deep heart, and every day she says something that I don't understand, and I dare not speak nonsense."

Liu Xie thought about it, but didn't say much.

According to what Yuan Heng said, Cai Yan should be studying issues such as angle of refraction and angle of reflection.Fortunately, reflection is nothing more than a matter of normal symmetry, but refraction is somewhat difficult. It involves trigonometric functions. Cai Yan has no mathematical foundation in this area, so it will be very difficult to solve.

After walking with Lu Xiaohuan for a while, Liu Xie stopped and asked Yuan Heng to accompany Lu Xiaohuan back first.

Lu Xiaohuan didn't care, she turned her head and walked back slowly.

Liu Xie stood for a moment, gritted his teeth, and decided to go and see Cai Yan.

He knew what Cai Yan was thinking, and even felt that Yuan Heng was paying attention to Cai Yan just now, hoping that he would go and see Cai Yan.It stands to reason that if Cai Yan wants to give up, he should pretend that he doesn't understand.

Let Yuan Heng succeed today, next time she will get even worse.

But he couldn't be cruel, he couldn't be so decisive.

-

Arriving at Lantai, Cai Yan was pacing in the yard.Just after washing my hair, the hair is not dry yet, and it is draped behind me to my waist.Wearing a homely casual dress, she looks very cool, showing off her mature figure.

Liu Xie only glanced at it and lost his mind for a moment.

This twenty-six or seven-year-old young woman is really different from eighteen or nineteen-year-old girls.

Cai Yan was not mentally prepared for Liu Xie's arrival, so he naturally stepped forward to greet him.When she saw Liu Xie's eyes, she realized that her clothes were not suitable, she instinctively covered the front of her clothes, turned around and left.

Liu Xie looked at her tightly wrapped waist without saying a word, just waiting in the yard.

After a while, Cai Yan changed his clothes and came out to greet him again.

She changed her clothes, but the embarrassment on her face did not fade, and even her neck was slightly red.

"I'm rude, please forgive me, Your Majesty."

"I came here in a hurry." Liu Xie waved his hand to explain his purpose. "How is the research going? Do you have any experience to share?"

Cai Yan was happy in his heart, but he said: "Yuan Heng's words are exaggerated, I just have nothing to do, just chatting for entertainment. Now that your majesty is here, I happen to have some questions, so I will ask your majesty for advice."

Said, Cai Yan invited Liu Xie to come to the study, found two lenses, a bronze mirror, and some papers full of words and pictures, and spread them all in front of Liu Xie.

Liu Xie took a rough look and knew that he guessed right.

Cai Yan's research is all about geometry, which can be roughly divided into two categories: one is reflection, and the other is refraction.

There is nothing to say about reflection. The angle of reflection is equal to the angle of incidence, which is easy to determine.

To Liu Xie's surprise, Cai Yan had already touched on the reflection that occurs simultaneously with refraction, and proposed the phenomenon of total reflection.Although the research is not deep enough and the critical value is not mentioned, it has already exceeded the scope mentioned by Liu Xie at the beginning.

However, the refraction angle problem that Liu Xie is most concerned about has reached the verge of being solved.

Cai Yan didn't understand trigonometric functions, but she used an ingenious method to actually solve the problem of trigonometric functions.

Draw a standard circle with refraction points, using heights instead of angles.

Liu Xie looked at the picture drawn by Cai Yan and was amazed. "Is this also the knowledge taught by your father during his lifetime?"

"Half." Cai Yan showed a smug smile. "The other half was thought up by myself. Of course, Xu Yue also helped, and there are similar usages in astronomy."

"You know Xu Yue very well?"

"In the past, I only heard his name. After he entered Yinfang, he met a few times. In terms of origin, there are some. His teacher Liu Hong was a good friend of his late father. He was recommended by his late father and entered the court during the Guanghe period. Preside over the revision of the calendar."

"Really?" Liu Xie knew that Xu Yue's teacher, Liu Hong, was a master in mathematics, and he was regarded as a mathematician in later generations.It's just that Liu Hong is old and doesn't want to travel around, so Xu Yue, who has learned a lot, came to Nanyang.

But he didn't expect Liu Hong and Cai Yong to have such a deep friendship.

Cai Yong is really an all-rounder, it's a pity to die.

Every time Liu Xie thought of this, his heart became furious, and he really wanted to dig Wang Yun's grave.

This extremist party member really failed to achieve success and failed.If it weren't for his great achievements in eradicating Dong Zhuo, his reputation would really be ruined.

"I heard that when you were living in the rivers and lakes, you lived in Taishan Yang's house for a while?"

"Yes."

"Is there still contact now?"

"We often exchange letters." Cai Yan lowered her eyelids. "A few days ago, I received a letter from Mrs. Kong, wanting to intercede for Kong Rong. Later I heard that it was Kong Rong's request, so that's all. It's a matter of personal friendship, and I didn't dare to disturb Your Majesty."

Liu Xie's eyes flickered slightly, but he hesitated to speak.

There is something in Cai Yan's words.

She was probably afraid that he would persuade him to marry again, so she simply blocked his mouth and told him not to meddle in her personal affairs.

But... this is not her private matter.

Seeing her growing old alone, how could she bear it?

Liu Xie thought for a while, then raised his eyelids. "Ling Shi, Yizhou has become a vassal. The major events in the Central Plains have been decided, and only Jiaozhou is left. If there are no accidents, it will be recovered in three to five years at most. After a few more years, I will go west."

Cai Yan raised his head and looked at Liu Xie with puzzled eyes.

It's no secret that Liu Xie wants to go west, she doesn't know why Liu Xie suddenly mentioned it.

"I'll tell you a secret." The corner of Liu Xie's mouth twitched slightly. "A secret that hasn't been told to anyone."

Cai Yan was a little surprised, and then realized that Liu Xie's words had some deep meaning.

Not telling anyone, but telling her, naturally regarded her as a trusted confidant, and not just a confidant.

If it's just a political matter, there are too many people who are more suitable for sharing secrets than her.

"What kind of secret is this...?"

"After the Western Expedition, I may not return to the Central Plains."

(End of this chapter)