Fast time travel: I sell mobile phones in another world

Chapter 234 Chapter 233, three questions (monthly ticket plus update)

Tang Yan looked at Yun Yi seriously.

"Senior brother Yunyi, do you know why the sky is blue? Why does the paper turn yellow after being used for a long time? When two stones of different weights fall from a height, which stone will hit the ground first?"

Yun Yi was stunned for a while.

How many lives?This is the first time a question has been asked of him.

However, it is only because the question is relatively new, so I will ask it temporarily.

He looked up at the sky, took out a yellowed book from the storage ring and observed it carefully, finally picked up two stones from the ground, one large and one small, and weighed them in his hands.

"The paper will turn yellow, which should be the reason for the invisible air in the air. The yellowed paper is different from the fresh paper, and it is mixed with elements of the invisible air in the air."

Tang Yan immediately looked at Yun Yi with admiration. Although the words he used were a bit strange, what he said was absolutely correct, that is, the paper was oxidized by the oxygen in the air.

Yun Yi continued: "The question about the two rocks is interesting. I subconsciously thought that the big rock would hit the ground first, but after thinking about it, I found that the two should hit the ground at the same time, which is a bit miraculous."

Tang Yan was surprised again.

Although Yun Yi didn't say the reason, the answer was right!

You must know that in Tang Yan's world, people mistakenly believe that the falling speed of an object is determined by the weight of the object itself. The heavier the weight, the faster it will fall.This misperception persisted for nearly 2000 years.

It was not until the appearance of Galileo and the famous Leaning Tower of Pisa experiment that everyone knew that the falling speed of an object has nothing to do with its own weight.

Unexpectedly, Yun Yi is quite experimental.

Tang Yan praised: "That's right! I really thought you would mistakenly think that the heavy stone falls fast."

Yun Yi laughed and shook his head: "No need to praise, it's just a very simple reason. There are two stones, one big and one small. If the big stone falls fast, the small stone falls slowly. Then tie the two of them together, and the speed should be moderate. But put the two stones together. According to the principle that heavy things fall faster, they should fall faster if they are tied together. So the two theories are contradictory, and if you think about it, there will be no misunderstanding."

Yun Yi said it simply, but if it were really that simple, people would not have misunderstood it for nearly 2000 years.

Tang Yan gave Yun Yi a thumbs up: "Then what about the first question I asked? Why is the sky blue?"

"I subconsciously thought that the sky itself is blue. But then I thought about it, flying in the sky, I can't see the entity of the sky at all. So I was also thinking, if the sky that is out of reach, if it is really blue, How did we see so far?" Yun Yi fell into deep thought.

Tang Yan said in his heart, what a guy!
She was talking about the scattering of sunlight by the atmosphere.Only indigo violet light is scattered by particles in the atmosphere due to its short wavelength, among which blue light has the greatest energy, causing people to perceive the sky as blue.

But according to Yun Yi, it is no longer enough to explain the scattering of sunlight.Time to explain how the Earth is round and how galaxies are!
However, the more complicated the other party's thinking, the easier it is to arouse interest, which is a good thing.

Tang Yan curled his lips slightly: "Senior Brother Yun Yi thinks, what kind of invisible air turns the paper yellow? Since the falling speed of objects is not affected by weight, what is it? The sky is clearly invisible, but why can it be?" See the color?"

"Why?" Yun Yi asked Tang Yan after thinking for a while, "Does Junior Sister know the answer?"

Tang Yan nodded: "This is also written in the book I found in the Palace Library. But for the specific reason, I will keep it a secret for now, brother, let's think about it slowly."

After saying this, Tang Yan turned around and left, leaving Yunyi alone to study.

In the next few days, Tang Yan never mentioned the previous question.I want Yunyi to become interested in nature and science during his exploration.

Under Zhou Jingru's leadership, they finally arrived at the territory of the Qingqiu Fox Clan.

The patriarch was an old fox in the late stage of foundation establishment. He warmly and respectfully welcomed Zhou Jingru and the three of them. He also compiled the lost portraits and basic information of the clan members into a book and handed them to Zhou Jingru.

These days Tang Yan is unilaterally competing with Yun Yi to see who will speak first.

It's just that the other party not only didn't mean to speak, but even didn't even frown these days.

Could it be that he didn't think about the problem?

And the offset point is still not long at all.

Tang Yan felt that compared with the other party, he might be the one who lost his composure in the end.

After Zhou Jingru got the portrait and information, he asked Tang Yan.

"I see that there are quite a few little foxes here. Do you want to stay here for a while?"

How could Tang Yan be in the mood to play with foxes?

Besides, many little foxes who are not enlightened or just in the stage of refining qi still retain the nature of beasts, defecating and peeing in the open, smelly and stinky, not cute at all.

Tang Yan waved his hand: "Let's go and find the lost fox."

A group of three people left Qingqiu and walked all the way to the palace.

Qingqiu County is not close to Kyoto, so it happened to be on the way to look for the fox demon.

Along the way, Yun Yi followed very obediently, not expressing his opinion at all.

After waiting for two days, Tang Yan felt that he had lost, so he had to take the initiative to ask the other party.

"Have senior brother Yun Yi understood the three previous questions?"

Yun Yi looked at Tang Yan, nodded, then shook his head again.

With a wave of his right hand, he separated the oxygen from the air: "It should be this invisible gas that caused the paper to turn yellow."

Then he pointed to the land under his feet: "I have traveled to many places in these years, and the land under our feet should be spherical. People standing under the spherical shape did not fall, probably because there is some kind of attraction in the heart of the earth. I think the falling speed of the object should be related to this attraction. It should also be related to the wind direction at that time and the obstruction of the object by the wind.”

Tang Yan didn't know what to say in his mind other than awesome.

Don't look at people who haven't studied physical chemistry knowledge systematically, and haven't thought about it.But after all, after living for tens of millions of years, the experience is really beyond the reach of ordinary people!

On the contrary, Zhou Jingru laughed from the sidelines: "Junior Brother Yunyi, you are only a little old, and you dare to say that you have traveled to many places? Although there are mountains and ravines in our Cangqing Continent, it is still a smooth road as a whole. It is absolutely impossible spherical!"

Yun Yi smiled and said nothing, and he didn't refute. Instead, he seemed to listen to the teaching with an open mind.

Tang Yan couldn't wait to ask: "The first two books are written in the same way. What about the answer to the last question?"

Zhou Jingru was a little curious on the side: "What's the problem?"

Tang Yan replied, "Why is the sky blue?"

Zhou Jingru burst into laughter immediately: "What kind of problem is this! Because the ground of the immortals in the sky is blue, so our sky is blue. You see, the ground under our feet is black. In the legendary hell, the sky is not blue. It's black!"

Tang Yan: "..."

Good guy!
A flat continent, and three interlayers, is this a sandwich?

(End of this chapter)