Tiantang Splendid

Chapter 2296

The nail hangs down from the door frame, and as Fang Jun releases his hand, it swings back and forth under the pull of his own gravity. This is a simple pendulum.

Everyone stared at the nails swinging back and forth in amazement, and was surprised to find that although the swings of the two nails were different, one was larger and the other was smaller, but miraculously, the two nails moved from one apex to the other every time. The swing time of the apex is actually the same...

In the inherent impression, heavy objects fall faster than light objects. The greater the swing of the nail, the slower the speed should be, but what is presented in front of you is a completely different scene...

His Majesty Li Er was still in a state of bewilderment, and this scene simply overturned his inherent cognition. After being stunned for a long time, Li Chunfeng slapped his thigh suddenly, excitedly, and shouted: "If you use this kind of device to make Measuring time, isn't it possible to divide a day into countless equal parts?"

What is the biggest challenge in measuring time?

is the error.

Any mechanism or machinery will change momentarily due to power, resistance, etc., and errors are inevitable.

But this swinging nail pointed out a clear way for him. As long as the nail swings, regardless of the magnitude of the power and resistance, as long as it is thrown, the time of each swing will be infinitely close to the same. To divide a day into countless parts, then the length of each part is also equal.

Fang Jun was amazed when he saw that Li Chunfeng understood the principle of this simple pendulum device.

It is indeed the most outstanding astronomer in history, so that he can enter the Chinese Academy of Sciences in later generations...

Yes, this is the isochronism of the pendulum.

As long as the ropes are the same length, the time to complete one swing is the same whether the pendulum swings more or less.

It is said that this theory was discovered by Galileo, and then according to this theory, the first pendulum clock in human history was made. As long as the 21st century, this kind of pendulum clock still exists.

Li Chunfeng clapped his hands and exclaimed: "Erlang is really a god!"

On the side, His Majesty Li Er stroked his beard with his hands, and looked relieved and praised, but in fact he complained crazily in his heart - who am I?where am iWhy can't I understand what they are saying?
But as an emperor, he naturally has the majesty of an emperor. The "Son of Heaven" is an extraordinary existence in the world. If he confesses that he has no idea what the meaning of the nail swinging in front of him is, wouldn't he appear ignorant?

Sometimes you can confess your ignorance, which will be considered as open-minded and shameless to ask; but sometimes you have to pretend to understand, otherwise you will be considered stupid and uncarable...

Fortunately, Li Chunfeng and Fang Jun are both very intelligent people, and they didn't come forward to ask stupidly - Your Majesty, do you understand?Come, come, talk, let me wait to see if His Majesty really understands...

If so, His Majesty Li Er might get mad.

*****
The progress of any subject in the world is a process of accumulation and accumulation.

And the discovery of every species in the world can promote an unprecedented revolution...

Fang Jun stood on the ridge of Lishan Farm, under the scorching sun, and the emerald green corn field at the foot of the mountain was spread out like a wide and thick carpet.

On the other side of the hillside, sweet potato vines are climbing wantonly in the open space on the other side of the hillside, and potato seedlings are everywhere next to it, covering the open space by the stream under the hillside. Dozens of servants of the Fang family are braving the scorching sun Shuttle through the potato fields, picking off the white, pink and purple flower buds that just bloomed.

If the potato flowers are in full bloom, it will lead to a decrease in potato production...

Along the mountain road, walk slowly with your hands behind your back. There are all kinds of fruit trees along the way. The branches are bent under the weight of fruits. Half of Lishan Mountain has become the largest "agricultural research park" in Datang. The grafted fruit trees and American corn , Potatoes, Sweet Potatoes, Peanuts, Nanyang Rice... from high to low, laid out layer by layer.

Fang Jun’s mood is like a king inspecting his territory. Compared with the knowledge of physics and chemistry, such as steelmaking, iron burning, glass making and pendulum clock making, which make him a “two knives” rather difficult, the planted on this half of the mountain All kinds of food are his favorite.

He knows the habits of each crop and can easily prevent various diseases. He can understand every growth stage very well, which makes him feel like a fish in water and everything is under control.

……

The tall corn grows vigorously, and the wind blows through the corn field. From above, it looks like a green sea wave. When you are in it, walking on the narrow path surrounded by tall corn stalks on both sides, you can feel cool and comfortable, and the wind blows in your ears. The leaves rustled.

Fang Jun spent the whole morning inspecting a field of corn, and he was very satisfied with the growth of all the corn.

As long as this field of corn harvests in autumn, next spring, the seeds will be enough to plant corn in the idle land in Guanzhong.

Coupled with potatoes and sweet potatoes, by next autumn, all the people in Guanzhong will be able to get enough food to eat.

Walk out of the corn field and walk on a slightly spacious path. In front of you is a thatched hut, which is reserved for the servants of the Fang family to patrol and watch over the corn. loss.

Behind the thatched hut is a canal, the clear water flows to the low place with gurgling sounds, and the canal is planted with rows and cages of peppers, with thick branches and leaves, and numerous fruits.

This kind of thing has to be naturally mature to have more flavor. The out-of-season vegetables grown in the greenhouse look similar, and even have higher yields, but because they violate their own growth laws, they lose their own uniqueness. smell……

An ox cart was parked in the open space beside the thatched hut, and the steer driving it was wagging its tail and gnawing the green grass on the ground leisurely.

An old man with white beard and hair was sitting cross-legged in the hut, with a tea set and a small stove beside him, sipping a cup of hot tea, feeling the fresh grass leaves brought by the wind blowing through the corn field, and squinting Close your eyes, looking like you're enjoying yourself...

Fang Jun hurriedly walked over, and when he arrived outside the thatched cottage, he bowed and saluted, and said respectfully, "Greetings, senior."

The old man turned around and saw that it was Fang Jun, with a kind and warm smile on his face covered with age spots, and he nodded slightly: "Erlang is here, come, come, sit here and have a cup of tea."

Fang Jun took off his shoes happily, a mat had already been laid on the ground of the thatched cottage...

An old servant who was not young hurriedly went to fetch water from the stream, put it on the stove to boil, brewed a pot of tea again, put it in front of the two of them, and took out a food box from the ox cart, opened the lid , Take out a plate of several scenes, and put some snacks of several scenes on it.

Fang Jun poured tea for the old man, and said with a smile: "For a summer outing, avoid the irritability in the city, and enjoy some fun in the fields. Gong Yuan's interest is really enviable to the younger generation."

This old man is Kong Yingda...

"Chongyuan" is Kong Yingda's word, only close family nephews can call him "Chongyuan Gong", others are not qualified.

However, Fang Jun and Kong Yingda have always been acquainted. This great scholar not only went to sea with Fang Jun, but also played mahjong at the same table in the market.

Kong Yingda heard Fang Jun's compliment, chuckled, and sighed softly: "When I was young, I always complained that I was entangled in trivial matters, and there were too many things to do. But when I am old, I can't get up to do anything, and I can only eat and wait for death." Only then will I know that if I can keep busy, it might not be a kind of happiness."

Filling the teacup in front of Kong Yingda with tea, Fang Jun asked: "The lotus in Qujiang Pond is lined with cool breeze, and Zhongnan Mountain is beautiful with beautiful waters and lush forests. Mr. Chongyuan will not go to these two places for sightseeing. Why did you come to this corn field? Although it is green, it is still a bit monotonous."

"Ha ha."

Kong Yingda reached out and picked up a piece of pastry, chewed it in his mouth, took a sip of tea, put down the teacup, opened his cloudy old eyes and looked around the continuous corn field outside the thatched hut, and said quietly: "This old man has traveled all over the north and south of the Yangtze River and the north of the desert outside the Great Wall. , I have experienced countless steep peaks and beautiful mountains and rivers, but I have never felt that there is any place comparable to a field of corn. The beauty of the mountains and rivers depends on the background of the place. There is always a lack of popularity, how beautiful is the thin and rigid landscape?"

(End of this chapter)