Want to See the Teacher's True Ability! (Please Follow and Bookmark)

Want to See the Teacher's True Ability! (Please Follow and Bookmark)

It was Ke Zhan's first time encountering this sort of situation, and he could not help wanting to take the wind out of Luo Yao's sails. He was already so arrogant on the first day of class—what would he be like later?

Besides, Ke Zhan truly wanted to see Luo Yao's abilities.

Maybe Luo Yao could even add a shining achievement to Ke Zhan's future title evaluation.

But class was in session, and so many people were watching. If Ke Zhan singled Luo Yao out for a test now, he would inevitably earn a reputation among the students for being petty. He decided to find another opportunity to test Luo Yao.

"All right. Since Luo Yao has already learned this semester's material, you might as well listen along and see whether your own understanding matches what we're going to cover."

Luo Yao thought that made sense, so he sat properly and waited for Ke Zhan to begin.

Ke Zhan composed himself and immediately got to the main point.

He had originally planned to continue teaching the fundamentals today, but after recalling what Luo Yao had said earlier, he temporarily changed the lesson plan and began explaining practice problems instead.

The other students suffered for it. They were still hazy on even the basic theory, and the moment they saw the problem Ke Zhan wrote on the blackboard, their vision went dark.

"All right, everyone, look at this problem. Assume we have a p-n junction solar cell chip."

"The electron mobility of the p-type semiconductor is μ_p, its electron diffusion coefficient is D_p, and its boron (B) doping concentration is N_A. The electron mobility of the n-type semiconductor is μ_n, its electron diffusion coefficient is D_n, and its phosphorus (P) doping concentration is N_D."

"The solar cell's surface reflectivity is R, the incident sunlight intensity is I_0, and the angle of incidence is θ."

"Come on, let's calculate this solar cell's short-circuit current (I_sc)."

After Ke Zhan finished speaking, the entire classroom fell silent.

"Fuck, this problem is downright vicious. Is he trying to kill me?" Wang Ye could not take it anymore. He did not even recognize half the things on the blackboard.

How was anyone supposed to learn this?

He truly regretted relying on his good physics grades to enter this department in the first place.

"How is it? Does no one know?" Ke Zhan held the chalk between his fingers as his gaze swept over Luo Yao.

Hadn't he claimed to have already taught himself this material?

Why was there no reaction?

Ke Zhan felt a little disappointed.

It seemed Luo Yao's talk was greater than his actual ability.

Those first prizes in three National Competition subjects were probably only because this year's questions had been easy.

He really needed to keep people like this in check in the future. Otherwise, once they entered society, society would give them a brutal lesson.

Of course Luo Yao did not move, because he wanted to see how Ke Zhan solved the problem and how it differed from his own method.

For Luo Yao, solving problems was the process he enjoyed most. If he could learn a new approach, then he had gained something.

"Come on, then. Let's start solving it."

"First, we need to understand what short-circuit current is. It is the current of a solar cell when there is a short-circuit external load resistance across its terminals. That is—"

"Isc=qμpNAμpNDTWI0sin(θ)"

"Teacher, there's a problem."

Before Ke Zhan could continue explaining, Luo Yao raised his hand from below.

Fuck?

He had actually spotted a problem?

Just as the other students were about to drift off, Luo Yao's voice scattered their drowsiness.

Everyone looked at the blackboard, but none of them could see any issue.

"What problem?" Ke Zhan froze. He frowned at Luo Yao and gestured for him to stand and speak.

"Teacher, the problem assumes a PN-junction solar cell chip."

"When considering the short-circuit current (Isc) of a PN solar cell, we need to consider two key factors: the electron doping concentration (ND) in the n-type semiconductor and the electron doping concentration (NA) in the p-type semiconductor."

"The difference between these two doping concentrations creates concentration gradients for electrons and holes, which in turn affect the current."

"In a PN junction, when the n-type semiconductor and p-type semiconductor come into contact, electrons flow from the n-type semiconductor to the p-type semiconductor, while holes flow from the p-type semiconductor to the n-type semiconductor, causing a redistribution of charge."

"So the calculation should be like this."

After voicing his thoughts, Luo Yao walked up to the podium without any hesitation, took a pen, and added a few strokes after Ke Zhan's formula.

Isc=q(μnNDμpNA)TWI0sin(θ)

"μ_nN_D and μ_pN_A respectively represent the contributions of electrons in the n-type semiconductor and holes in the p-type semiconductor. The difference between the two constitutes the current of the entire solar cell."

"This current is generated under the effect of the built-in electric field, whose magnitude and direction are determined by the difference in doping concentrations."

"So this is the correct way to calculate the short-circuit current."

As Luo Yao spoke, Ke Zhan verified it. Before long, he realized Luo Yao was right.

He had not expected Luo Yao to catch such a minor mistake.

To save face, Ke Zhan could only say, "It was just a small slip of the hand. I've recently published a paper, so I've been busy and haven't rested well."

"A paper?"

"What field does your research focus on, Teacher?"

"Design and Implementation of Microchip Power Circuits Driven by Solar Photovoltaic Cell Modules." This was Ke Zhan's proud work. He had spent the whole year preparing to apply for an associate professor title, and publishing papers was necessary for that, so he really had been busy.

After saying that, he did not forget to tell the students to find semiconductor journals and study them.

To dispel the awkwardness caused by Luo Yao correcting him earlier, Ke Zhan spent most of the rest of the class talking about the process of writing that paper.

After returning to his seat and listening for a while, Luo Yao felt even more strongly that Ke Zhan's level was ordinary.

After class, Ke Zhan quickly left with his books.

After seeing Luo Yao leave, Wang Ye let out a breath and said, "You really gave him no face by correcting him like that. What if he secretly makes things difficult for you later?"

Luo Yao frowned. "He won't. Even if Teacher Ke isn't very skilled, he wouldn't do something like that."

"Shh!" Wu Tianming hurriedly stopped Luo Yao from continuing. Only after leading the two of them out of the classroom did he say, "Are you two crazy? Discussing that kind of thing in the classroom—what if someone hears and runs off to report you?"

"What would be the point of doing that?" Luo Yao looked baffled.

Wu Tianming said gloomily, "Of course, to pass the exams."

"Genius, final grades are split between exam scores and regular performance scores. The failure rate in our major is around sixty percent. Guess how many people do extra things just to get full performance marks?"

"What if he deducts your regular performance score?"

"What percentage of the final grade does the regular performance score count for?" Luo Yao thought about it and decided to ask the most important question first.

"Thirty percent."

"Then it's fine. Even if he deducts all of it, I can still pass." Luo Yao said it without a care.

Wu Tianming and Wang Ye looked at each other, knowing that was something only a top student could say.

"By the way, where's the school library?" Luo Yao suddenly perked up.

"In a building outside."

"Are you going to read?"

"I'm going to look at Teacher Ke's paper. I want to see what his true ability is like."

P.S. Thank you all for your support and tips. An extra chapter has been added. Please keep voting—if the results are good, there'll be ten thousand words a day after launch!