Trigonometric functions are no longer an unfamiliar new course to this group of senior seniors.
Compared with this, Li Sheng recently added the new concept of "derivative" to the academy, as well as "differential". This is the most difficult part for them recently...
In contrast, trigonometric functions are simply too friendly to ordinary people.
Li Sheng saw everyone's reaction, and none of them really showed any embarrassment about trigonometric functions. Li Sheng couldn't help but feel more comforted.
It's a pity that calculus...
It would be great if they could become more proficient in this, not to mention simple astronomy applications such as using navigation instruments, but also to actually study astronomy.
But having said that, the key now is to go south.
With resources, there is industry. With industry...
It doesn't matter how many scientists you want, Li Sheng is very familiar with this routine.
After confirming this, Li Sheng was not polite.
Nodding, he raised a big baggage from under the conference table...
This large bundle was wrapped in black cloth. It looked as big as a wheel, and there was something bulging inside.
Wu Meiniang and others subconsciously murmured to themselves, what the hell is this...
Wei Ziyu frowned instantly and opened his eyes wide.
Why does this outline look familiar...
I seem to have seen him in the academy before.
Immediately afterwards...
Li Sheng didn't show any concern and directly lifted the black cloth.
I saw a strange-shaped copper object, full of circles, rectangles... and other geometric shapes, covered with scales, and movable like a machine, appearing on the long pear wood table.
When everyone saw it, they couldn't help but be stunned.
Is this some kind of instrument?
But... everyone present followed Li Sheng, the period may be different, but the time is not short.
But no one has ever seen an instrument with such a strange shape...
Judging from the many scales on it, it seems to be an instrument similar to a ruler, used for measuring something.
But the strange thing is that the ruler is just a long bar, and the length can be measured directly by comparing it to the object.
But this thing has such a weird shape... What is it used to measure?
Wu Meiniang, Ma Zhou, Gao Ziyang and others looked around... but still couldn't figure it out.
But Wei Ziyu on the side couldn't help but be stunned, because this thing...
She seems to have seen...
It seems to be used...
"This...this is a sextant?!"
Wei Ziyu finally remembered and exclaimed in surprise.
Sextant…
If she remembered correctly, it was an astronomical instrument!
In ancient times, people who could understand astronomy could easily become guests of various forces regardless of their origins.
And instruments specially used to study astronomy...
Not to mention, it is the technological crystallization of Tianzi No. 1, which only the royal family can and can possess!
For example, armillary sphere!
And the copper instrument in Li Sheng's hand... looks like something similar to the legendary armillary sphere!
When Wei Ziyu shouted this, everyone else on the side immediately frowned.
Some people looked puzzled, while others frowned and looked thoughtful.
No one has seen this thing before,
But the word sextant seems to have been heard somewhere...
At this time, Li Sheng smiled slightly.
"Ziyu, you remember correctly, this thing is a sextant."
"I will go to sea this time. I made sixty copies of this thing. Each ship will take five of them, one for normal use and the other four for backup."
"ah?"
After confirming this name from Li Sheng's mouth, everyone suddenly felt at ease.
Looking at the materials used for this refined brass and the extremely delicate scales, it is obvious that this is an important item.
"Master..."
"Start calling me General now, the action is about to begin. I know what you want to ask..."
Li Sheng took a deep breath,
"You probably want to ask how to use this thing..."
"Actually, it's very simple. This thing is similar to a sundial. But the difference from a sundial is..."
"With a sundial, you can only get simple time... But with this thing..."
Li Sheng smiled slightly,
"You can obtain other data, of course you must use the most accurate time possible..."
"More precise..."
"What's the use of this?..."
"General, please clear up our doubts. No one has seen this thing before..."
"General, what on earth is this used for??"
Although everyone respects Li Sheng like a god, no one has ever seen this thing before. Li Sheng takes it so seriously...
This thing doesn't look like a magic weapon. Although I don't know how powerful it is, I'm still confused.
Is this thing so magical?
For more accurate time readings, use this thing...
It's so complicated, and to put five of them in each boat, so many spare parts, can be considered extremely serious... So what's the use of this?
Li Sheng chuckled,
"Using the data read from this special sundial and calculating it with time, you can get your position."
"Location?"
Everyone couldn't help but be startled, and for a moment they didn't realize what Li Sheng meant.
own position...
What location is this?
"General, where is your position?"
"The location of the ship you are on. With this thing, you will not get lost when you sail out to sea and reach any place on the sea."
After Li Sheng finished speaking...
Wu Meiniang, Wei Ziyu, Ma Zhou, Gao Ziyang...
Everyone who came to the meeting that day was stunned.
You can go anywhere on the sea without getting lost????
No wonder...
Now everyone knows why there are so many spares for this thing.
This thing is so amazing!
This is a real divine thing!
In shock, Li Sheng just smiled.
"What are you surprised about... This positioning method can at most help you identify a specific area, such as near the Qiongzhou Strait... Similar results. You will study hard in the future, and by then you will be able to identify the hair and beards of all the people in the world.
You can see clearly."
"Ah? All over the world?"
Li Shengyue said that Wu Meiniang and the others were even more surprised. This was no longer outrageous, but it was probably not outrageous at all... this kind of thing.
Isn't it invincible to be able to observe everyone in the world?!
Li Sheng smiled slightly and did not introduce to everyone how awesome the military reconnaissance satellites of later generations were.
Anyway, I can’t make it now, I’ll talk about it later.
It's more important to get down to business first than all this small talk.
Seeing everyone staring at him like bells, Li Sheng clenched his fists and coughed lightly,
"Okay, since you haven't forgotten the trigonometric functions and you all passed the exam in the academy, I won't arrange additional exams for you. Anyway, remember this sextant, you..."
"Now that you are going to sea, you can forget your last name, but you must not forget the use of sextant, you hear me!"