Wei and Jin cooks

"There is a machine based on electricity that can transmit information quickly and is used for communication, so it is called a communication radio."

Ji Shuyan: "Can you use electricity?"

He looked at Fu Tinghan in surprise, "Wouldn't this kill him?"

Fu Tinghan: "The ionosphere is very clean now. The radio only needs about fifteen volts of current to transmit information. This electricity will not kill anyone."

Did Ji Shuyan understand? "This... how can you spread this? How can you guarantee that if there is thunder here, it will also thunder in Chen County?"

Now it was Fu Tinghan's turn to be confused, with a confused look on his face, "What? What does this have to do with thunder?"

"Where can lightning come from without thunder?" Ji Shuyan said, "Don't you want to send messages by telex?"

In fact, as soon as Fu Tinghan said it, Ji Shuyan thought he was talking nonsense. When thunder and lightning crackled, could you still run out to say hello to the lightning and let it help send a message?

Although he felt that there were gods and immortals in this world, he did not believe that there were thunder gods and lightning females in the clouds.

Zhao Hanzhang couldn't stand listening any more, so he put down his pen and said: "In "Shuowen Jiezi", it is said that electricity is caused by yin and yang radiating. The electricity they understand is lightning."

Although their understanding was correct, it was quite different from Fu Tinghan's definition.

When Fu Tinghan heard this, he quickly brought the topic back and said to Ji Shuyan: "This has nothing to do with lightning..."

He paused and then changed his words, "Actually, it has something to do with it."

Fu Tinghan understood immediately that there was a generation gap between them. If Ji Shuyan could help him, he must first accept some new definitions.

He asked Ji Shuyan to sit next to him, pulled out a piece of white paper and explained to him what electricity was, what the ionosphere was, and how information spread in the ionosphere.

This is a brand new worldview. Rather than questioning, Ji Shuyan is more curious, "Fu Shangshu, where did you get such knowledge?"

He looked suspicious that he had been deceived.

Ji Shuyan couldn't help but look at the other person in the room, hesitated for a moment, and then reminded him kindly: "Your Majesty, Fu Shangshu is pure and upright. Those sorcerers who are called half-immortals should not be allowed to see Fu Shangshu to prevent them from being deceived. "

Fu Tinghan pursed his lips and said displeasedly: "Ji Shuyan, even if I am honest, it is not a matter of IQ. I will not be deceived."

Zhao Hanzhang laughed loudly when he heard this, and simply put down his pen and walked over, taking a look at the picture drawn on Fu Tinghan's drawing. It not only showed the ionosphere, but also a map of the transmission of radio waves in the air and on the ground.

She thought for a while and explained in words that Ji Shuyan could understand: "Mr. Ji, people today often think that thunder and lightning are controlled by the male thunder and lightning mother. Although I fear ghosts and gods, I don't believe that there are thunder male lightning females in this world."

Ji Shuyan nodded slightly, he thought so too.

Zhao Hanzhang: "So, since there is no male thunder and lightning mother, how is thunder and lightning produced?"

Ji Shuyan frowned. He had never thought about this problem. Most people in the world had never thought about it. Some people might have doubts in their hearts, but they did not think deeply about it. Naturally, they did not conduct further research.

Zhao Hanzhang said: "Both Ting Han and I thought that thunder and lightning were caused by clouds in the sky. When white clouds float in the sky, it is sunny, and when there are dark clouds, it rains. Then there must be some clouds that are charged, and the charges between clouds are different. , they will collide when they meet in the air, just like two grumpy people bumping each other's shoulders, and a big conflict will occur. The light that occurs at that time is called lightning, and the sound is thunder."

"At this time, the electric explosion in the air became more and more intense, and it was very different from the electric potential on the ground. Just like the Han and Jin countries, when one country's national power is too strong and another country's national power is weak, that country will crush the other country. The same is true between heaven and earth, so thunder and lightning from the sky will strike the ground. In serious cases, houses will collapse and people will be injured or killed."

Ji Shuyan slapped his thigh and praised: "You are so talented!"

Fu Tinghan: ...He clearly explained the potential difference just now.

Zhao Hanzhang turned around and smiled at Fu Tinghan, and continued to talk to Ji Shuyan: "So, there is electricity in the air. Do you understand this, Mr. Ji?"

Ji Shuyan nodded.

Zhao Hanzhang waved to Tinghe, took a pearl from her head, held it in his hand and said to Ji Shuyan: "Fu Zhongshu said that there is a kind of short wave that can propagate in the air, just like this pearl. If it is short wave, When we hit the next shot, it hit the ground, bounced, fell again, bounced again... from the point where it hit the ground to that point."

Zhao Hanzhang waved to Tinghe, who immediately ran over to pick up his pearls, then pricked up his ears to listen.

"What we have to do now is to develop a machine that can emit short waves that propagate in the air. It will fly up to the ionosphere. The ionosphere is between 120 and 4,000 miles above the ground. We emit The radio waves are transmitted in it, then fall to the ground, bounce back to the air from the ground, continue to propagate, and bounce again..."

"Just like that pearl, it goes round and round, and finally reaches thousands of miles away," Zhao Hanzhang said: "It is also that machine. It can capture the radio wave, so that we can know the information thousands of miles away."

Ji Shuyan was still full of questions. He listened but didn't quite understand, so he asked: "That machine can allow us to hear sounds thousands of miles away?"

Zhao Hanzhang nodded, paused and said, "It's not words, it's this."

She raised her finger and tapped the table, and said to him: "If I limit it to you, three long and one short means danger, three short and one long means leaving. This is our code word. The same goes for telegrams. We can analyze it according to the code word. The radio waves received, this is the message.”

Ji Shuyan was still doubtful, "Your Majesty, it's not that I don't believe you, but, is this really true?"

Zhao Hanzhang smiled and nodded.

Ji Shuyan said nothing.

Fu Tinghan sighed and said: "If you don't believe it, just let me build this machine and you will know."

Ji Shuyan suppressed the excitement in his heart and said, "I am willing to build it with you. What should we do first?"

Fu Tinghan: "We have to prepare materials first..."

Seeing that they could finally cooperate, Zhao Hanzhang turned back to deal with her official documents.

The telegraph machine cannot be built in a short time. It is just a research project. Fu Tinghan will do research after he is busy, and Zhao Hanzhang will occasionally help.

Compared with Ji Shuyan, Zhao Hanzhang understood what Fu Tinghan wanted better, so he cooperated tacitly.

Ji Shuyan put himself and Fu Tinghan on the same line at the beginning, but then slowly sank down. Now he has started to stand behind Fu Tinghan with a small notebook every day as an apprentice. Oh, if Zhao Hanzhang comes, he will follow Behind the two people are their two apprentices.

After Fu Tinghan finally made wires and generators and let Ji Shuyan feel the feeling of being electrocuted, he finally believed that they were indeed doing something powerful.

It was now the sixteenth day that they had been sieging outside Meng County, and there were only two days left before Zhao Hanzhang's scheduled counterattack.