A nation's industrial development begins with junior engineers.

"This little brat, wasn't he supposed to be talking about the double-slit experiment? How did he suddenly switch to the Sagnac effect?"

While waiting for Jiang Xia to write on the blackboard, the experts gathered together to discuss it.

"One is a general-purpose thing, and the other is more theoretical. These two things are not completely unrelated, but they are not closely related either!"

"Is this kid here to ask for help? It seems my clan gave him some homework, saying he'd get a spanking if he couldn't finish it..." Zehui's husband stroked his chin, recalling a little anecdote his friend had casually mentioned a while ago.

"Hmm? I remember the department has something related to lasers, but unfortunately Daheng is still in Changchun. He's the real expert in optical instruments..."

The murmurs gradually subsided after Xiao Daimao wrote down a series of formulas.

For a closed annular optical path (area A, perimeter L), when the system rotates at an angular velocity w, the optical path difference between the two beams propagating clockwise and counterclockwise is:

ΔL=4Aw/c

Well, it's nothing serious; this falls under the classic framework of the Sagnac effect.

But what happened next...

"Hiss, Δn=4Aw/λL, that's interesting. Is this the mathematical relationship between optical path difference and frequency difference?"

Δ?=2π/λ*ΔL=8πAw/λc

"What did Comrade Jiang Xia write? I don't quite understand it."

"It's normal not to understand. To me, this seems to be the relationship between phase difference (Δφ) and optical path difference. I vaguely heard Daheng mention it when I was chatting with him the other day, but he only managed to do the first step. As for the rest..."

Ignoring the heated discussions surrounding the pillars below, Jiang Xia became increasingly excited as he wrote.

Absolute rationalization is actually quite useful; it integrates scattered fragments hidden deep in memory.

Thanks to the experts and professors who lectured on Douyin, the professional courses that Jiangxia later used as lullabies are shining brightly at this moment.

The real lecturer, YYDS!

As Jiang Xia wrote more and more, Teacher Gan Chang, who had been expressionless, raised his eyebrows and then tightened them.

He took out his small notebook, placed it on his lap, and stared at Jiang Xia's lines of formulas, his eyes suddenly becoming sharp.

At the same time, the group of women who had huddled together also stopped exchanging pleasantries with each other.

"Lorentz factor? Why introduce it here?" Senior Sister Zehui frowned, somewhat puzzled!

What is the Lorenz factor?

Dr. Lan Ying, being a semiconductor expert, was already feeling a bit dizzy from all the talking. Listening to Senior Sister Ze Hui's mutterings, she couldn't help but chime in out of curiosity.

Yes, what is he trying to do?

Senior Sister Zehui is also thinking about this question: "The Lorentz factor, also known as the relativistic factor, is the scaling factor of the moving frame relative to the stationary frame, given by special relativity, which is the 'length contraction' and 'time dilation' of the moving frame relative to the stationary frame."

After explaining, Senior Sister Zehui fell into deep thought again.

Dr. Lan Ying: (￣△￣；).

In the meeting room, apart from the screeching sound of chalk on the blackboard, there was only heavy breathing.

"This kid, this kid... is he going to complete the physical model for the practical application of the Sagnac effect?"

The old man, whom Senior Sister Zehui called "Little Brother Jia," suddenly stood up abruptly and pointed shakily to a line of formulas that had just appeared on the blackboard.

Δnrel=Δn?(1?v2/c2)^?1/2

"He introduced special relativistic effects and corrected the frequency difference formula by introducing the Lorentz factor!"

Wow, no wonder he's an old man whose name is a top secret decades later; his theoretical knowledge is quite extensive.

As Jiang Xia continued writing about the correction of non-ideal light paths, at least half of the pillars below understood what the young man on stage was trying to do...

"If the light path is triangular or rectangular, the relationship between the area A and the perimeter L needs to be corrected."

Staring at the blackboard, Mr. Gan Chang, gripping his pen tightly, suddenly spoke up: "Triangle or rectangle? That makes sense, that makes sense. In that case, using lasers to drive nuclear fusion..."

Upon hearing this, Old Wang, who was helping Jiang Xia move the small blackboard to the stage, slipped and almost fell flat on his face.

"Waaaaah... Bro, what are you trying to do? You don't have to go this far..."

At the back door of the conference room, Secretary Liu and Yang Erlengzi, who were carrying several large water jugs and about to bring them in, exchanged a glance, and their forward steps silently turned into retreats.

Unfortunately, after taking two steps back, he was met with the amused smile of "Old Li," the old master of the lair.

"Hey, this brat should be locked up..."

……

Teacher Gan Chang's statement prompted the pillars of the organization to begin discussing in hushed tones, after all, this was their main job.

Ignoring the commotion in the meeting room, Jiang Xia's attention was completely focused on the blackboard in front of him, drawing on his experience of teaching his coworkers.

His writing speed is not very fast, but each stroke is very neat.

若探测器最小可测频率差Δnmin≈1?Hz，光路参数L=1m、A=0.1m^2、λ=633nm，则)wmin≈/633x10^?9*1/4x0.1x1≈1.6x10?6rad/s.

When Zehui's husband saw this explanation, his expression also turned serious.

Although it was far removed from his major, the unique beauty of mathematical formulas still deeply impressed him.

However, he still couldn't understand it. He nudged "Brother Jia" next to him and asked, "You mentioned a physical model earlier? Like the 'Young Lady' model we built?"

"Little Brother A" ignored him and continued copying.

Teacher Gan Chang turned his head and smiled gently: "Not bad. Although you're still a bit lacking compared to the young lady, you can already start applying the formulas mentioned earlier when it comes to the practical application of the Sagnac effect..."

"He started from the classical framework and built the derivation of the frequency difference (Δn) and the corrections for practical engineering applications. Good heavens, he also considered the relativistic corrections applicable to high-speed rotation and the corrections for non-ideal optical paths..."

"Correction of non-ideal optical paths!" Teacher Gan Chang gestured to Senior Sister Ze Hui's husband to look at the first few pages of his notebook.

"constraint!"

"Yes, the constraint of certain reactions. If this kid is right, then not only can key elements be constrained through magnetohydrodynamics, but it seems that lasers can also be used!"

After whispering this, Teacher Gan Chang looked expectantly at the little boy who was writing furiously, "Once the revisions are complete, then it's time to..."

Zehui's husband pouted with some regret: "It's a pity, Daheng wasn't there..."

"Shut up!" Henchman A turned and glared at them. "If we can't deduce the last few steps, I'll crush you all!"

(⊙o⊙)...

Looking up, the whispering crowd discovered the reason for "Brother Jia's" anger.

Jiang Xia, who was on the stage, stopped writing at some point. He took two steps back, pinched his chin, and looked at the writing on the blackboard in front of him, seemingly deep in thought.

"Did it get stuck?"

"Infrastructure, extended derivation, data correction, and next should be the monitoring of sensitivity and minuteness?"

"Given the current level, it is indeed very difficult..."

Besides "Little Brother Jia," Teacher Yu also completely followed Jiang Xia's line of thought, and completely deduced the parts that Jiang Xia had not completed.

Hey, The Brain +2.

Ah, how fortunate China was to have such meritorious figures back then!

Amidst the gazes of the crowd, filled with worry, anticipation, or longing.

Jiangxia finally made a move.

wmin = λL/4AΔnmin. Typical value: 1 degree/hour!

ΔL=4Aw/c.典型值：10^?12～10^10m

Δn = 4Aw/λL, typical value: 0.1～10Hz

"Please forgive my little bit of capriciousness for taking up some of your time. Seniors, can we now refine the physical model of the laser gyroscope based on this?"

Jiang Xia straightened his body and gently placed the chalk on the platform.

He turned around and quietly waved to Old Wang.

"Old Wang, help..."