Chapter 135 Calling for Foreign Aid
In the astronomical world of later generations, there are many types of astronomical telescopes.
According to technical principles, it can be divided into many models:
Such as reflecting telescopes, refracting telescopes, radio telescopes, etc.
The first astronomical telescope in human history built by Galileo was a very standard refracting telescope.
The modern Hubble Telescope is also a refracting telescope, but its diameter has reached the human manufacturing limit of a single optical mirror.
The James Webb Telescope and others are reflecting telescopes.
As for radio telescopes
This is relatively rare.
For example, the Sky Eye in our local mountainous area is a radio telescope, and the ticket is only fifty yuan.
As for the astronomical telescope Xu Yun mentioned, he naturally refers to the reflecting telescope, which is also the most popular type of telescope in later generations.
But no matter how simple the hand-rubbing process is, there is one link that is unavoidable:
That is, the calculation of data.
From the most basic imaging focus,
Effects of moderate to atmospheric disturbances,
It is as big as human flesh optimization through axial spherical aberration curve.
Almost every process requires mathematical calculations.
Of course.
As a professional who has been engaged in scientific research for his entire life, Xu Yun is not troubled by the calculation of these data.
With just a few basic data, you can calculate it even with your eyes closed.
But the problem is
Does this make sense?
Science knowledge is not as memorized as liberal arts. Especially for the professional research and development field, cramming education is meaningless.
Because the R&D field requires constant updates and iterations, that is to say, practitioners must have hands-on capabilities.
The preparation of allicin before was for emergency purposes, so Xu Yun did not have time to explain the deeper knowledge clearly.
But now it is a regular physics teaching situation. If everything is explained clearly clearly on the initiative, it may not be a good thing for Lao Su and others.
Even in later generations of teaching, teachers sometimes personally asked students to conduct experiments to verify phenomena.
Get hands-on experience and use practice to break through cognitive barriers.
This is much better than pure one-way knowledge infusion.
So this time, Xu Yun chose to be a stranger.
He pondered for a moment and said to Lao Su:
"Sir, according to the notes left by the Fengling Yueying Sect, there is not much difference in structure between the telescope and the microscope.
Both require the use of objective lenses and eyepieces, but the focus, that is, the accuracy of the mirrors, is somewhat different.
But unfortunately.
The manuscript's record of the telescope only ends here, and the later parts were accidentally lost.
The second half is precisely the most critical link in the production process, involving a lot of mathematical deductions. Some necessary accuracy is lost, and the telescope... alas. ”
Lao Su couldn't help but frowned. As a big boss who had done combination engineering, he naturally understood what the precision data represented:
"Xiao Wang, why is the data lost?"
Xu Yun sighed after hearing this, as if remembering something regrettable, and explained:
"It is said that in a certain year and month, Shi Hao was calculating whether it was possible to cut off time. Unexpectedly, a man with red hair suddenly broke into the sect and took away the second half of the manuscript and Shi Hao's favorite milk. jar.
Since then, Shi Hao has been determined to live in seclusion, hiding from the world and not being recorded in ancient history."
After hearing Xu Yun's words, a trace of regret suddenly appeared on Lao Su's face.
Throughout the history of previous dynasties, there have been as many talented people as stars in almost every dynasty who retired to the fields because they were disheartened.
Some, like Tao Yuanming, lived a carefree and indifferent life after retiring into seclusion, leaving to future generations a majestic figure who was open-minded and open-minded among the mountains and rivers.
Some, like Wang Rong, only left one or two footprints and handprints, and were occasionally sighed by future generations.
And more are penniless, and all traces have disappeared with time.
Their names can only be vaguely glimpsed once or twice in the county annals where they live in seclusion, and most of them will have the words "unknown birth and death" added at the end.
at the same time.
Old Su thought of his good friend again, another Old Su - Su Shi.
Brother Zizhan is currently settled in Danzhou (which is later known as Hainan). I wonder how his health is now?
I heard that in another year, the emperor may issue a general amnesty. I hope that Brother Zizhan will be favored by God
Then Lao Su returned his mind to reality and put his thoughts on the astronomical telescope.
For such an "artifact", he really didn't want to give up.
Then he thought for a moment, and with some expectation, said to Xu Yundu:
"Xiao Wang, although the notebook about the telescope has been lost, you still remember the structure of the object, right?"
Xu Yun pretended not to understand the purpose of this sentence and nodded obediently:
"That's right."
When Lao Su heard this, a glimmer of light suddenly flashed in his eyes.
He was silent for a moment, seemed to have made up his mind, and solemnly said to Xu Yun:
"Xiao Wang, if you can provide enough wealth and calculations, is it possible to rebuild an astronomical telescope?"
Xu Yun groaned softly, with a trace of solemnity on his face:
"Although the accuracy data of the items required for astronomical telescopes has long been lost, the axiom basis for surveying and mapping accuracy is still there.
If we can find some manpower and have all the materials, we can combine the axioms with reverse reasoning and have a chance to build an astronomical telescope.”
Hearing Xu Yun's words, Lao Su's eyes suddenly lit up with joy, and he turned around to look at each other, Xiao Li and Xiao Zhao.
After a while.
I saw Lao Su taking a deep breath, making some determination, and decisively said to Xu Yunde:
"In this case, we will try to see if we can restore the astronomical telescope again!
It would be a pity that such an instrument that allows mortals to look up at the sky was buried so quietly. ”
After saying that, he paused and continued to say to Xu Yun:
"Xiao Wang, I wonder who or what is needed to make an astronomical telescope?"
Xu Yun thought for a while and said:
"First of all, it is natural to be a mirror maker, and also to be a master of the world.
Whether it is a microscope or an astronomical telescope, the real core is actually the objective lens and eyepiece.
Especially for telescopes, if the precision of the glass mirror is high enough, you can cut down a piece of bamboo to make the mirror body.
Therefore, high-quality glass raw materials and craftsmen are essential. Of course, further processing and polishing are also required.
By the way, the donkey also needs to be prepared. ”
In the weird DIY circle of later generations, hand-rubbing telescopes is a very common thing.
The commonness is even much higher than that of hand-twisted generators.
After all, homemade generators are generally useless, but homemade telescopes can see far away or look at the stars.
Therefore, in the DIY circle, airplane cups and telescopes are basically the two most common items.
There are generally three ways to make your own telescope:
One is to just buy the parts from a certain package and assemble them yourself, which means you save on brand fees and processing fees.
The second is to buy a cheap convex lens yourself, grind the lens to achieve silver mirror reaction, and grind and assemble it throughout the process.
The third is to use Gaussian optics to formulate equations and use three surface curvatures as variables to calculate the spherical aberration coefficient, which is standard pure hand rubbing.
Of course.
The third method seems to be mainly based on calculation, but when making and grinding lenses, the higher the requirements for manpower and materials, the better.
So after listening to Xu Yun'e's request, Old Su thought for a moment and turned to Xiao Zhao:
"Your Highness King Jian, I'm afraid I need to trouble you this time."
Xiao Zhao put his hands behind his back and readily agreed:
"No problem, just leave the craftsman who makes the utensils to me. The required materials will also be listed. They will be available within seven days."
When Xu Yun heard this, he quickly raised his hand to Xiao Zhao:
"Then there is His Royal Highness King Laojian."
"Can you help me?"
Xiao Zhao raised his eyelids and glanced at Xu Yun, with a slightly sarcastic smile on his lips.
However, he seemed to have restrained himself, and finally did not speak.
Now that Zhao Ji has just taken office, except for a few close friends, there are almost no high-ranking officials who can be trusted.
Although the handover process of the throne was relatively peaceful, everything seemed to go smoothly.
But for the royal family, having no one of their own in the court can basically mean that they are surrounded by dangers.
Even Zhao Ji, a futile king of later generations, was quite sensitive in this environment.
Therefore, if Xiao Zhao took the initiative, he would need craftsmen and property to build a star-gazing toy, and the entire process would be completed under the eyes of Song Huizong.
Then not only would Song Huizong not refuse, but he might even double meet Xiao Zhao's request and give him whatever he asked for.
After all, looking at all the brothers, Xiao Zhao is the one who poses the greatest potential threat to him.
If he indulges in playing, it means that Zhao Ji can devote more energy to developing his confidants.
No matter how bad things are, you can still get more power from the Queen Mother.
Actually.
This is also one of Lao Su's purposes. He hopes that the relationship between the two emperor Zhezong's brothers can be eased to friendship as soon as possible.
Just
Is this possible?
Think of this.
Lao Su exhaled a sigh of relief and forced himself not to think about these political issues.
After all, I have resigned from my job and am doing my best in some things just out of emotion. There is no need or energy to get involved too much.
Then he looked at Xu Yun and asked:
"Xiao Wang, apart from property and craftsmen, what else needs to be prepared?"
Xu Yun glanced at Lao Su, who had an expression on his face that said, "My family is quite big, you can say that." He pondered for a moment and replied:
"Except finance and craftsmen, there is only a little left"
"That point?"
"A master of arithmetic and deduction!"
"Arithmetic deduction?"
Lao Su repeated the word, which was not too surprising.
After all, Xu Yun said before that the accuracy of the telescope must be calculated first before preparation.
Although everyone now has basic arithmetic knowledge, it is obvious that there is still a certain gap between the levels of such preparation and calculation.
Even Lao Su himself did not have a particularly deep understanding of mathematics.
This is also a very common phenomenon in later generations. Top physicists actually have little interaction with top mathematicians.
The mathematical literacy of many physicists is just that they are better than other people except mathematicians.
This is true even for later generations with complete systems of mathematics and physics, let alone ancient China.
It is impossible for even Lao Su to dabble in two of the most profound science majors at the same time.
Then Lao Su thought for a while, and suddenly a figure flashed in his mind.
I saw his expression was shocked, and he said to Xu Yun:
"Xiao Wang, I have a good friend named Han Gonglian, known as Mr. Yang Huai.
In the early years, when I was ordered to test the armillary sphere used by the Taishi Bureau, I met this person by chance.
This person was very fond of arithmetic and deduction throughout his life, and his calculation ability was extraordinary, and he was even ranked among the top five in Beijing.
I am currently working in the capital studying arithmetic. If I ask, this person will definitely be willing to help! "(End of Chapter)