Wang Lin continuously pressed and released the handle against the textbook in his hand.
On the other side of the baffle, Ju Zi found the corresponding characters from the corresponding page number, line number, and column number in the textbook based on the numbers, and copied them onto a piece of paper.
"Hello, Douluo Continent."
The six characters formed a complete sentence on the paper. Ju Zi looked at the sentence, and bright light flashed in her beautiful eyes.
Her gentle voice lost its languor. Ju Zi looked at Wang Lin, her admiration completely unconcealed.
"How did you come up with that?"
"Senior Sister Ju Zi, you should know about the Soul Guide Machine, right? The most primitive model of the Soul Guide Machine was actually driven by electricity, which involves the mutual conversion of electricity and magnetism."
Wang Lin began to explain from the start how he discovered the conversion between electricity and magnetism, and then applied this theory to the Soul Guide Machine.
This part was what Wang Lin had not written in his thesis. Everyone present, except Ke Ke, including Xuan Ziwen, Xiao Hongchen, and even Ju Zi, had read Wang Lin's thesis on the Soul Guide Machine.
"...I named this principle the Law of Electromagnetic Induction."
Wang Lin's explanation was concise and easy to understand. Combined with the presence of the electromagnet in the wired Soul Guide Telegraph, and the fact that they were all top-tier Soul Engineers.
Even Ke Ke, who had never read Wang Lin's Soul Guide Machine thesis, understood Wang Lin's explanation.
"Current can generate magnetic force!"
Ke Ke looked at the circles of copper wire wrapped around the iron bar and exclaimed in surprise.
"Of course. I just discovered the principle and then applied it," Wang Lin said, taking out a thesis from his storage soul tool titled "Electricity and Magnetism, A New World."
"And this is science!"
As soon as Xuan Ziwen saw this new thesis, his eyes immediately showed desire. Wang Lin smiled and handed the thesis to Xuan Ziwen.
Xuan Ziwen took the thesis and quickly flipped through it. His brows couldn't help but furrow.
Besides the part Wang Lin just explained, the thesis mostly focused on the expansion of knowledge in the field of electricity and magnetism, without mentioning any application to Soul Tools.
Handing the thesis to Ju Zi beside him, Xuan Ziwen said.
"Wang Lin, does your 'science' not involve Soul Tools?"
"Of course it does. What I'm presenting is the principle, not the actual application."
Wang Lin spoke earnestly. Since he had come to the Douluo Continent, the science of this world must include soul power and cannot be separated from it.
The existence of soul power was a huge advantage for this world. Aside from anything else, his world in his past life had not yet developed technology for spatial Soul Tools.
However, the existence of soul power also brought some drawbacks to this world, as Soul Tools were too omnipotent.
Consequently, basic physics and basic chemistry in this world had hardly developed.
Take gunpowder as an example. Ten thousand years ago, Tang San could use gunpowder to kill a Soul Saint, but ten thousand years later, gunpowder was only used as material for fireworks, a brief flash of brilliance.
No one cared about simple gunpowder. Not to mention Soul Tools, even Soul Skills could achieve the effect of gunpowder, let alone the rapidly developing Soul Tools.
The needs of Soul Masters have always been an extension of soul power. The decline of the Tang Sect had reasons related to this.
"But your Soul Tool is too unlike a Soul Tool. The electromagnet inside could be easily replaced by a magnetic force Soul Tool array. Why did you use this electromagnet? Was it just to prove your theory?"
Ke Ke questioned from the side.
"The price of Soul Tool metal that can transmit soul power with low loss is several hundred times higher than the price of copper. Short distances are fine, but over long distances, the cost involved is something even the Sun Moon Empire cannot bear."
Wang Lin explained, and Ke Ke suddenly understood.
Ju Zi put down the thesis in her hand. Xiao Hongchen took the thesis and began to read it.
"Indeed. If applied to the battlefield, the speed of information transfer would be greatly enhanced. The impact of this on warfare is immeasurable."
Ju Zi truly saw the value of the wired Soul Guide Telegraph. She looked at Xuan Ziwen and said in a deep voice: "Teacher Xuan, let's seal it."
"Alright." Xuan Ziwen nodded, looking at Wang Lin. Wang Lin nodded: "You decide. I have no objection."
Wang Lin then took out another thesis from his storage soul tool titled "Potential Difficulties the Wired Soul Guide Telegraph May Encounter in Practice."
"Teacher Xuan, let's submit this one together."
He placed the thesis in Xuan Ziwen's hand. This thesis discussed the problems encountered during the development of the wired telegraph in his past life.
The reason for submitting it was simple: Wang Lin couldn't figure out how to solve those problems using Soul Tools. He was clearly not cut out for researching Soul Tools.
If he were, he would have directly pulled out the wireless Soul Guide Telegraph. That part involved the conversion of electromagnetic signals.
He could manually build the simplest wireless telegraph, but the signal transmission distance was only two or three meters. He had no clue how to achieve further breakthroughs.
But the wired version was different. The distance issue was merely a matter of whether the wire was long enough and the voltage was high enough. The former was easy to solve.
The latter was not difficult in this world with Soul Guide arrays. If a Rank 1 discharge Soul Tool array's voltage wasn't enough, they could switch to Rank 2, and if that didn't work, Rank 3...
It would always meet the demand!
Therefore, Wang Lin's role was to be a guide, releasing the knowledge from his past life.
Allowing the top Soul Engineers of this world, such as Xuan Ziwen and Xiao Hongchen, to learn and apply it.
"Impressive."
Xiao Hongchen put down the thesis, immersed in the world of electricity and magnetism. Wang Lin's thesis opened up a brand new path for him.
He waved his hand, and a golden light flashed.
Two magnets floated up from the workbench. An elliptical metal ring moved back and forth between the two magnets.
Xiao Hongchen narrowed his eyes, sensing and controlling the distance between the two magnets, while also speeding up the movement of the metal ring.
Snap!
An electric arc jumped from the ring to his fingertip. Xiao Hongchen smiled as he withdrew his hand and said in a deep voice: "Interesting. It seems even ordinary people can control lightning."
His remark directly affirmed the value of Wang Lin's thesis "Electricity and Magnetism, A New World." Electricity generates magnetism, and magnetism can also generate electricity, without relying on soul power.
"This thesis must also be sealed," Ju Zi said in a deep voice. However, Wang Lin immediately shook his head and refused. "Not this thesis. I don't intend to submit it."
Saying this, Wang Lin took the thesis back from Xiao Hongchen and put it away. Sealing it meant submitting it to the Mingde Hall, where only high-rank Soul Engineers were qualified to view it.
Wang Lin, as the author of the thesis, would also be prohibited from spreading it arbitrarily.
Wang Lin had no objection to sealing the wired Soul Guide Telegraph thesis, as it involved practical application and would have a significant impact on warfare.
But this purely academic thesis was different. It contained no knowledge on how to apply it to Soul Tools.
It merely introduced various aspects of electricity and magnetism. This was pure knowledge, and blindly sealing it had no meaning.
It came back to the point that knowledge could only be truly useful when learned by the corresponding talents. Furthermore, electricity and magnetism were not complex.
One only needed to be able to carve a Rank 1 discharge Soul Tool array and recognize magnets to conduct relevant research.
The fact that this concept had never been proposed on the Douluo Continent was purely due to cognitive inertia.
So, even if his thesis on electricity and magnetism were circulated, without guidance, the Soul Engineers on the continent would still treat it as garbage due to cognitive inertia.
At least the Soul Engineers of the three empires would. Even if it was utilized by others, Wang Lin wouldn't care. With him present.
The Sun Moon Empire, already far superior to the three empires in Soul Tool technology, would not be surpassed because of a small Law of Electromagnetic Induction.