Want to See Teacher's True Strength! (Seeking Follow-ups and Collections)

Chapter 17: Want to See the Teacher's True Strength! (Please Read and Bookmark)

Ke Zhan had never encountered this situation before. He couldn't help wanting to take the edge off the other's arrogance. If someone was this arrogant on the first day of class, what would they be like later on?

Besides, he genuinely wanted to see Luo Yao's strength.

Maybe the kid could add a brilliant stroke to his future professional evaluation—you never knew.

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

"Alright, since classmate Luo Yao has already learned this semester's material, it wouldn't hurt to listen and see if your understanding matches what we're about to teach."

Luo Yao thought that made sense, so he sat back down and waited for Ke Zhan to begin the lecture.

Ke Zhan composed himself and got straight to the point.

He had originally planned to continue with basic theory today, but after recalling Luo Yao's words, he changed the lesson content on the fly and switched to explaining practice problems.

This was tough on the other students. They were still foggy on the fundamentals, and the moment they saw the problem Ke Zhan wrote on the blackboard, their vision went dark.

"Alright, everyone, take a look at this problem. Suppose we have a p-n junction solar cell chip."

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

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

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

After Ke Zhan finished speaking, the classroom fell into collective silence.

"Holy crap, this problem is vicious. Is it trying to kill me?" Wang Ye couldn't hold it in anymore. He didn't recognize half the things on the blackboard.

How was he supposed to learn this?

He seriously regretted joining this department just because he was good at physics.

"What's the matter? Everyone stumped?" Ke Zhan held the chalk, his gaze sweeping over Luo Yao.

Didn't he say he'd already self-studied?

Why no reaction?

Ke Zhan felt a bit disappointed.

It seemed Luo Yao was all talk and no substance.

As for winning first prize in three subjects at the National Competition, it was probably because this year's exam questions were easy.

He'd really have to keep a tight rein on this kind of student in the future, or else they'd get a harsh lesson from society once they graduated.

Luo Yao hadn't moved, of course, because he wanted to see how the teacher's problem-solving method differed from his own.

For Luo Yao, solving problems was the most enjoyable part. If he could learn a new approach, he'd come out ahead.

"Alright, let's start solving the problem."

"First, we need to understand what short-circuit current is. It's the current of a solar cell when the battery terminals are short-circuited with an external load resistor. That is—"

"I_sc = q μ_p N_A μ_p N_D T W I_0 sin(θ)"

"Teacher, there's a problem."

Before Ke Zhan could continue, Luo Yao raised his hand from his seat and spoke up.

What the hell?

He actually spotted an issue?

The other students were just about to doze off when Luo Yao's voice jolted their drowsiness away.

Everyone looked at the blackboard but couldn't see anything wrong.

"What problem?" Ke Zhan was taken aback. He frowned at Luo Yao and gestured for him to stand up and explain.

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

"When calculating the short-circuit current (I_sc) of a p-n type solar cell, we need to consider two key factors: the electron doping concentration (N_D) of the n-type semiconductor and the electron doping concentration (N_A) of the p-type semiconductor."

"The difference in these two doping concentrations creates a concentration gradient of electrons and holes, which in turn affects the current."

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

"So when calculating, it should be like this."

After stating his thoughts, Luo Yao didn't hesitate. He walked up to the podium, picked up a pen, and added a few strokes to the formula Ke Zhan had written.

I_sc = q (μ_n N_D μ_p N_A) T W I_0 sin(θ)

"μ_n N_D and μ_p N_A represent the contributions of electrons in the n-type semiconductor and holes in the p-type semiconductor, respectively. The difference between these two constitutes the entire current of the solar cell."

"This current is generated under the influence 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 was verifying the math on the side. He quickly realized Luo Yao was right.

He hadn't expected this small mistake to be caught by Luo Yao.

To save face, Ke Zhan could only say, "That was just a minor slip of the hand on my part. I've been busy lately publishing a paper, so I haven't been resting well."

"Thesis?"

"What direction is the professor researching?"

"Design and implementation of a microchip power circuit driven by solar photovoltaic cell modules." This was Ke Zhan's proudest work. He had spent the entire year preparing for his associate professor evaluation, and to qualify, he needed to publish papers—so he was indeed busy.

After saying this, he didn't forget to tell the students to look up semiconductor journals for study.

To dispel the awkwardness from Luo Yao correcting him earlier, Ke Zhan spent the rest of the time talking about the process of writing his paper.

Luo Yao returned to his seat and listened. The more he heard, the more he felt Ke Zhan's skill level was mediocre.

When class ended, Ke Zhan quickly grabbed his books and left.

Wang Ye, seeing Luo Yao about to leave, let out a breath and said, "You know, correcting him like that just now was really disrespectful. What if he quietly makes things difficult for you?"

Luo Yao frowned. "No way. Even if Professor Ke isn't highly skilled, he wouldn't do that."

"Shh!" Wu Tianming quickly stopped Luo Yao from continuing. He led the two out of the classroom before saying, "Are you two crazy? Discussing this inside the classroom—what if someone overhears and rats you out?"

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

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

"Top student, final grades are split between exam scores and participation scores. Our major has a fail rate of around 60%. Guess how many people do extra things just to max out their participation points?"

"If you keep this up, what if your participation score gets docked?"

"What percentage of the total grade is the participation score?" Luo Yao thought for a moment, deciding to ask the most crucial question first.

"30%."

"That's fine. Even if it's all deducted, I can still pass." Luo Yao said indifferently.

Wu Tianming and Wang Ye exchanged glances, knowing that only a top student could say something like that.

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

"In a building outside."

"Are you going to study?"

"To read Professor Ke's paper. I want to see what his real ability is like."

P.s. Thanks for the support and tips. I've added an extra chapter. Keep the votes coming—if the results are good, I'll drop ten thousand words on release day!