May I be seated, may I ask you for something?"

Jia Yi looked at the mage in front of him, he didn't look very old, but he was a little more than thirty years old, he didn't restrain his breath, and he still had a mage badge on his chest, looking at his breath, although he was not a white-robed mage, it shouldn't be too far away from breaking through.

He was wearing a more formal robe, and it seemed that he had made a special trip, but Jia Yi didn't remember that he had invited anyone at all.

"Hello, Master Jiayi, my name is Fresenden, and I took the liberty to come here today to ask for a question. ”

Jia Yi sat down for a moment, making a sound of listening, and then heard the mage on the other side say, "Master Jia Yi, you still remember that when you published the telegram paper, you finally followed a paragraph about electromagnetic communication. ”

"You mean the broadcast?" Kaichi thought he had come to discuss the conservation of energy, or maybe he thought he had discovered some weakness in the conservation of energy, so he came over to discuss it.

The heat quality is slowly cooling now, but it can't be cool right away, Jia Yi avoided the limelight at the time when the energy conservation was in full bloom, and now everyone has become more rational after coming back, but there are still people who often take the question of heat quality to discuss with Jia Yi.

Some of them are really in doubt, and some of them are still expecting to overturn the case for the heat and quality.

"Do you call this a broadcast?" the other muttered in a low voice, "Yes, that's it, I'm very interested in this, I've been studying it all this time, but there are some things that I don't particularly understand, and I'm stuck." ”

Fesenden looked at Kaichi expectantly, but Kaichi was a little embarrassed: "Ah, but I didn't study much about broadcasting, and I just wrote an idea at the time." ”

Although he also had some ideas, he was currently paying more attention to some thermodynamic research and was not prepared to spend too much thought on the application of electromagnetism.

The direction he set for himself has always been the study of water and fire, water represents matter, fire is temperature, and later represents energy, and finally, it is the combination of matter and energy.

"Anyway, this is the first thing you brought up, and there must be some special understanding of what you're talking about broadcasting," Fresenden said. I already have a preliminary plan for the study of broadcasting, but it doesn't feel practical, so I want to come and ask for advice. ”

"Then tell me what the problem is, and I'll see if I can help. ”

Fresenden took out a small metal disk, on which a magic circle had been arranged, and at the top of the metal disk was an antenna standing, he took out one or two discs and released them, and introduced to Jiayi: " This is the transmitter I made, the original telegraph has been improved, using ultra-high frequency current, can send out high-frequency radio waves, speaking on the circle, the vibration of the sound will be converted into the vibration of electromagnetic waves, emitted, after the other transmitter receives it, and then the current is converted into the vibration of the film through electromagnetic induction, and converted into sound. ”

As he spoke, he also demonstrated, speaking above one of the circles, and sure enough, the other circles vibrated and made sounds.

Jia Yi looked at it and felt a little puzzled: "Aren't you already very mature, is there any problem?"

"Of course, there are big questions. Fesenden will stop the circle, "The distance is too short. The telegram was able to transmit information across almost the entire continent, but this of mine, the broadcast, could not be covered by even Moshacher. ”

As he spoke, his brows furrowed, he pointed to the small antenna on the circle, and continued:

"I've calculated that if I want to get the broadcast to both sides of the strait, the closest shore to Lei Chau and Beisen Chau, then my antenna will have to be at least 15 feet, and if I want to travel far enough, I will need to build an antenna hundreds of feet high, which is not practical at all. ”

Jia Yi was a little puzzled to hear, it was nothing to build an antenna tens or hundreds of meters, this can transmit sound, which is much more convenient than telegraphs.

"Then it's okay to build an antenna, after the magic circle is improved in the future, the power will definitely be able to be reduced. There's a radio tower built right in Moshacher, and the sound can travel across the channel, what's the difference?"

"However, this way you can't carry it with you, can it only be fixed in one place, this is too impractical, I hope that everyone can use it like a telegraph, instead of only building such a tower in each mage association, but can only transmit some unimportant information, such information can use copper crystal telegraph, and the confidentiality is better. ”

Jiayi somewhat understood what he meant, he himself thought about radio and radio, but Fesenden thought about mobile phones, with current technology, mobile phones are definitely not good, if you want to realize mobile phones, you must build a base station, otherwise the power of mobile phones can not transmit electromagnetic signals far.

Jia Yi looked at Fresenden and laughed, although he didn't laugh out loud: "Ha, I don't think your thinking is right, you shouldn't use this as a communication like a telegraph at all, in fact, you just need to build a high-power broadcasting tower to send messages, and others can use this simple magic circle to only receive messages, not send them out." ”

A simple radio is much simpler, I believe many people still remember the ore radio in the physics textbook, but the radio station is much more complicated.

Fresenden seemed to understand a little: "It's like... Like..."

"Like a newspaper, in fact, it should be more like the public channel of the telegraph, the public channel of the telegraph also needs other people to keep the radio silent, otherwise it will affect the end of the message, the broadcast does not have to be so troublesome, the rest of the people can only receive the information, not transmit, and can directly hear the sound, even the illiterate people can use it. ”

Although the prophecies of each country are different, most of the people know a little lingua franca, thanks to the Supreme Council, which is the lingua franca between the mages set by the Supreme Council, unless it is too remote, even if they can't speak it, at least they can understand a general idea.

"Thank you, thank you. Fresenden quickly stood up and looked to Jiayi, "Thanks to your solution, otherwise I would have thought my research was worthless, but fortunately I came to ask you, otherwise I would have given up on this." ”

Jia Yi shook his head and didn't dare to take credit: "This has nothing to do with me, it's all your own research, even if you don't have me, after your paper is published, this plan will be put forward soon." ”

Fresenden was only a little stray because of the telegraph, but after being turned on by Jiayi, he understood everything and immediately discovered the potential of broadcasting.

He couldn't sit down with excitement, but he still thanked Jiayi: "It's also thanks to you for waking up, otherwise I don't know when I'll understand, even after it's published, I don't know when I'll be found out." And I gave you all this idea, speaking of which you have research on sound wave detection, and there is also a telegraph in electromagnetism, and the connection between sound waves and radio waves is also mentioned in that paper, if you want, I'm afraid I will fall behind you like Walkern. ”

Kaichi was a little puzzled: "Who is Walken?"

"Walken is my friend, your first copper crystal telegram mentioned electromagnetic telegraph, he felt very excited after seeing it, and wanted to study it, but he didn't expect that just a little idea, you gave the plan of electromagnetic telegraphy, and Master Magnay also gave a complete magic circle, although this is a good thing, so that everyone can communicate with each other very conveniently, but it also makes all his efforts in vain, a big blow. ”

"This, I'm really sorry, your friend is okay?" Jia Yi didn't expect to meet his mischievous friend at that time, and felt a little embarrassed, thinking about it carefully, what he did at that time was indeed a bit inappropriate, wasting a lot of time and effort from others.

"Fortunately, in fact, the defeat at the hands of you and His Excellency Magnay is enough for him to be proud of, but he was hit and went out for a walk. I also studied radio to set an example for him, to cheer him up, and not to be so unlucky forever. ”

As he spoke, he laughed: "Fortunately, you are now turning to the study of thermodynamics, if you are still studying electromagnetism, I am really afraid that you will easily study broadcasting." ”

Jia Yi was a little embarrassed, and smiled a little dryly: "Hahaha, how can it be such a coincidence, your research is great, let me introduce you to His Excellency Magnay, he will definitely be interested in this." ”

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