Chapter 160 How to use the bronze sun wheel Unexpectedly, Ye Zhen actually said that this bronze sun wheel is a measuring tool? But no matter how you look at it, this bronze sun wheel doesn't look like a ruler.
Director Huang watched Ye Zhen's program nervously from the sidelines.
"Is this Teacher Ye's style of doing shows?"
In fact, Director Huang does not usually go to watch the programs on his own station.
Because there are so many programs on the station, if he wants to watch them by himself.
There is simply not enough time, so Director Huang generally won't pay attention.
But now Director Huang is watching Ye Zhen perform the show, and he feels frightened.
Because he felt that Ye Zhen's thinking was too out-of-the-box and not like a normal person.
Producer Chen said with a leisurely expression: "It's okay, that's it."
However, many things in this program are unsolved mysteries in the archaeological community.
It's all just a guess, and some things can't even be guessed at.
Just like the diamond-shaped bronze eyes just now.
Kong Sisi and Liu Yan stared at Ye Zhen intently, as if it didn't matter what the content of Ye Zhen's program was.
The two of them were very satisfied just looking at Ye Zhen.
Especially Ye Zhen wore custom-made new clothes today, which made her charm even higher.
In the midst of the gathering, Professor Zhou looked at the bronze sun wheel.
"This thing doesn't look like a measuring instrument."
"Old Wu, what do you think? You are a professional."
No matter what, Lao Wu participated in the third excavation back then.
In fact, the third excavation lasted almost ten years.
Digging a lot.
"The archaeological community now unanimously believes that this is a symbol of the sun."
"The five radiating horns symbolize the sun."
"And the craftsmanship of this quintile is not simple."
Anyone who has done manual work or has a certain understanding of industry will know it.
The equal divisions of even numbers are relatively easy, such as the equal divisions of even numbers such as two, four, six and eight.
It is naturally easier to do.
But for thirds and fifths, even odd numbers are a bit more difficult to divide.
If you don’t believe it, you can try it yourself.
Is it easier to divide a piece of paper into four or five equal parts?
But Ye Zhen actually said this was a measuring instrument? This doesn't look like a measuring instrument at all.
I just saw Ye Zhen silently starting to write on the small blackboard.
It immediately makes people feel like they are in class.
Ye Zhen knocked on the blackboard and said, "Everyone, take a look."
Ye Zhen drew an identical bronze sun wheel on the blackboard.
Ye Zhen's skill alone made people watching the show exclaim.
Just like a printer, Ye Zhen drew it freehand without using any props.
In fact, many teachers who were students can do it.
Without a ruler, just relying on chalk, you can draw a very neat circle on the blackboard.
There are even some geography teachers who can draw a map of China with their bare hands.
Ye Zhen said while drawing: "Suppose you use line segments to connect the tops of the five awns of the wheel-shaped device.
It forms a regular pentagon inscribed in the outer circle of the wheel-shaped device.
Each two awns and one side of the regular pentagon form an isosceles triangle, with a vertex angle of 72 degrees.
Draw a perpendicular to the base through the vertex. This perpendicular is the angle bisector of the vertex.
It is also the height of an isosceles triangle, which bisects the vertex angle into two 36-degree angles.
In Guanghan, where the Sanxingdui ruins are located, the sun's altitude angle on the winter solstice is exactly 36 degrees. "
After hearing this, the audience began to be stunned.
Everyone began to feel that something was wrong.
Ye Zhen smiled and said, "This is just junior high school knowledge. I shouldn't need to explain it in depth."
"Everyone, keep watching.
The expression of the relationship between the solar altitude angle and latitude of the observation point in the northern hemisphere at noon on the winter solstice is:
α=90°-23°26′-β.
Among them: α is the solar altitude angle, β is the latitude of the observation point.
The latitude of Sanxingdui is about 30°55′
α=90°－23°26′－30°55′=35°39′。
The difference from 36 degrees is only 21′, not even one degree.
Now everyone knows how terrifying the accuracy of the Sanxingdui bronze sun wheel is. "
Some of the audience's knowledge has already been returned to the teacher.
"I don't understand, but I'm shocked!"
"Wait a minute, I'm not taking geography class!"
"It's too strong. Did the ancients in Sanxingdui actually have such accurate measurements?"
Only knowledgeable people know that it is necessary to calculate such an accurate angle.
It must require very developed knowledge of astronomy, as well as mathematical knowledge to keep up.
At the same time, very skilled bronze craftsmanship is also required, which is indispensable.
Then Ye Zhen said: "Let's take a look at how the ancients measured.
It is recorded in "Zhou Li·Da Situ".
Use the method of Tu Gui to measure the depth of the soil and correct the shadow of the sun to find the center of the earth. ...The shadow of the solstice is five inches long, which is called the center of the ground.
It can be seen that the people of Zhou used the watch to measure the shadow of the sun. On the summer solstice, when the watch was eight feet long, the shadow was one foot and five inches long.
In human terms, it is tgα=a/b, α is the altitude angle of the sun, a is the surface length, and b is the shadow length. "
At this point, some viewers are starting to get a little confused.
Ye Zhen continued to write on the blackboard.
"We can also find this mathematical relationship on the bronze sun wheel.
The magical 36-degree angle mentioned earlier and the right-angled triangle formed by the height and half of the base of the isosceles triangle constitute the above mathematical relationship.
tgα=a/bα=36° is the solar altitude angle on the winter solstice in the Sanxingdui area, a is half of the base of the isosceles triangle, and b is the height of the isosceles triangle.
...A lot of words are omitted here. "
I saw Ye Zhenyi's calculations.
This small amount of calculation is simply a piece of cake for Ye Zhen's viewers were just lost in thought.
When watching the show again, Ye Zhen had already written all over the blackboard.
"Damn it, did I miss something? I was just playing with my phone."
"It smells bad, I'm not taking online classes!"
"My mother asked me why I studied so hard and now I am still watching online classes. I cried to death!"
After Ye Zhen’s explanation and calculation.
Ye Zhen pointed to the blackboard and said: "With this calculation, we can get the sun's altitude angle on the summer solstice here in Sanxingdui.
It's only one point different from what we measure with modern tools.
One can imagine how accurate this is.
The solar altitude angle, surface length, and shadow length on the winter solstice and summer solstice are all solidified in the bronze sun wheel.
You guys said this is not a measuring instrument, what is it? "
Some archaeologists and historians were dumbfounded.
"How is it possible? This bronze sun wheel is really a measuring instrument."
"Did the ancients in Sanxingdui actually have such an accurate calendar?"
"Is it only one point different from what our modern instruments measure?"
"Such advanced mathematics and craftsmanship!"
This shows that the people who made the bronzes at that time must also know astronomy, calendar, mathematics and the precise production of bronzes.
Only after thousands of years can it still be so accurate.
This is indispensable! Old Wu looked at Ye Zhen excitedly, "I didn't expect that he actually decrypted it. This bronze sun wheel is actually an astronomical measuring instrument."
"This shows that the astronomical knowledge of Sanxingdui people was extremely advanced at that time."
"It's no better than what we are now."
How terrible is this?
Thousands of years ago, the ancient people of Sanxingdui already had an accuracy comparable to our modern ones.
And it's all condensed into a bronze sun wheel.
If it weren't for Ye Zhen, who would have known that this was actually a measuring device.
"Teacher Ye is really amazing!"
"How on earth does he know so much!"
"Mom asked me why I was watching TV on my knees."
The archaeological experts and historians stopped talking.
Because they still have some professional knowledge, they can still understand Ye Zhen as long as he writes it.
But also because of this, they knew that what Ye Zhen said was not wrong at all.
This bronze sun wheel is neither a decoration nor a shield.
It is a real measuring device! Ye Zhen's discovery was enough to publish an academic paper.
Some of them are already ready to move.
Plagiarism and unauthorized publication have long been commonplace in academia.
Otherwise, where do you think the word "xueval" comes from?
Ye Zhen smiled and said, "Everyone has seen how magical this Sanxingdui ruins is."
“The ancient people of Sanxingdui possessed astronomical knowledge far beyond that of their time.”
"But the things I mentioned above are not the most magical things in Sanxingdui."
Because as of today, Sanxingdui is still under excavation.
The excavations in the 80s were the third excavations.
But in the 21st century after this, there was a fourth excavation! And many people should have seen the news reports at the time of this excavation.
Some people even live broadcast the excavation process.
But even so, what was excavated is only about two thousandths of the Sanxingdui ruins.
It can truly be considered the tip of the iceberg.
“In the two sacrificial pits, a golden scepter was also unearthed.
This golden scepter belongs to Pit No. [-].
At that time, why did some people say that the bronze Dali man might be holding a scepter in his hand?
It's because of the golden scepter unearthed in this pit.
There is also a little story here, when the archaeological team excavated it.
The archaeological team excavated something golden, which was seen by local villagers at that time.
Someone asked the teacher, what is this? Is it gold?
The archaeological team members said patiently that there was no gold here, it was just copper.
Because at that time he didn't want people to know that gold had been unearthed.
Because once people know that there is gold, there is no telling what will happen.
But someone asked, if it were copper, wouldn’t it have rusted long ago?How could it be so golden?
The archaeological team member said that this is brass, and the rusty ones are bronze.
In this way, those villagers were sent away.
Finally, it was discovered that it unfolded and turned out to be a golden scepter! "
The golden scepter represents supreme power both at home and abroad.
However, in the history of our country, there has never been a similar golden scepter unearthed.
After some viewers saw the golden scepter, they immediately thought of ancient Egypt, which was also one of the four ancient civilizations.
"The golden mask and the golden scepter look like ancient Egypt."
"This is the first time I've seen this golden scepter."
"I have visited so many museums, but this is the first time there is a golden scepter here in Sanxingdui."
Just like the current Pope or some foreign kings and so on.
During the inauguration ceremony, there must be something like a scepter.
On the contrary, in the history of our country, the scepter has not been used as a symbol of power.
There are things like walking sticks, but there is no scepter that symbolizes power.
This is the weird thing here in Sanxingdui.
In academia, there are various opinions about this golden scepter.
Some people say it is a scepter that represents power, some say it is used by priests, and others say it is a magic weapon used by wizards.
Anyway, there are various arguments.
Ye Zhen was still smiling, "Guess what this golden scepter is used for?"
(End of this chapter)