Chapter 61 Toy Cars, You Use Extra-Material?

"Of course, we have to make the light make way for this car!"

As soon as these words were spoken, the entire livestream room fell silent.

After a brief, almost suffocating silence, the bullet chat exploded with an unprecedented force, like a mountain tsunami.

"??? Make light make way? Streamer, did you drink fake liquor today? Saying stuff like that, Einstein is about to burst out of his coffin!"

"Crap, what did I miss? I just went to the bathroom, how did we jump from a children's car to theoretical physics in the time it took to get back? Isn't this leap a bit too big?"

"LMAO, the Streamer started making up sci-fi settings on the spot just to sell his toys, right? I love this, make up more! The kids love to hear it!"

"The person above, stop being a hater. What do you know? This is called 'Little Factory Director Li's Bedtime Story Session.' Its main feature is hardcore hypnosis, specifically for treating insomnia."

...

Looking at the screen full of ridicule and doubt, Li Jiajun didn't get angry; instead, he became even more excited. He stopped writing and turned around, his face overflowing with a kind of fanaticism unique to geniuses—the feeling of being the only sober one while everyone else is drunk. He enjoyed this feeling too much; the whole world thought he was bragging, but only he knew that he was touching the edge of truth.

He walked back to the computer in a few quick steps and, in front of hundreds of thousands of Netizens, quickly changed the livestream title to 'Little Factory Director Li Is Starting Class—Teaching You How to Make the Emperor's New Clothes from Scratch.'

After changing the title, he stood before the whiteboard again, cleared his throat, and began his most classic and most hated 'Dimensional Reduction Science Popularization' segment in the tone of a university honorary professor emeritus giving an introductory lesson to kindergarteners.

"family, quiet down. I know everyone's education level is limited and your imagination is relatively poor, so it might be a bit difficult to understand. But it's okay, Teacher Little Li isn't charging today. I'll give you a free makeup lesson to expand your horizons, which have been restricted by poverty."

His opening remarks, full of 'humanitarian concern,' were like a precision-guided bomb, once again igniting the powder keg of the bullet chat.

"??? I'm reporting this! The Streamer is carrying out indiscriminate personal attacks!"

"Your education level is the one that's limited! Your whole family's education level is limited!"

"He's coming, he's coming! He's walking toward us with his 'narrator-style poisonous tongue' and 'area-of-effect insults'!"

"Brothers, I feel like my 985 university diploma was thrown on the ground by the Streamer, stepped on ruthlessly, and then ground into the dirt."

...

Li Jiajun completely ignored the 'impotent rage' in the bullet chat. He was now immersed in his own world, drawing a wavy line on the whiteboard to represent a river and a circle in the middle of the river to represent a rock.

"Let's imagine a simple scenario. This is a small river, and the water is flowing. Now, if we put a rock in the middle of the river, what happens? Use your Big Smart One brains and think about it."

He paused, as if deliberately giving the livestream audience time to think and answer.

"The water flow won't stop, right? It will naturally go around this rock and then recombine on the other side of the rock to continue flowing downstream. To a fish downstream, it might not even know there was a rock upstream blocking the flow; its world is continuous."

He tapped the 'rock' on the whiteboard heavily with the tip of his marker.

"What we need to do is replace this rock with our little car. And replace this small river with the omnipresent light."

"We only need to cover the surface of this children's car with a coating made of a special material. This coating is like an invisible, perfectly smooth guided channel that can guide the incoming light, allowing it to smoothly bypass the car body without producing any reflection or refraction, then perfectly recombine on the other side of the car and continue propagating in its original direction."

As he spoke, he drew a diagram on the whiteboard of light bypassing an object. The curvature of that light path was elegant and full of physical beauty, leaving the few science students in the livestream room mesmerized.

"In this way, the person standing in front of you will receive light from behind you in their eyes. Your car is effectively 'transparent,' so naturally, they won't see you. Forget your parents' eyes; even if the most advanced high-definition surveillance camera is pointed right at your face, all it will capture is the wall and scenery behind you."

"Is this principle hard to understand?" Li Jiajun spread his hands, an innocent expression on his face that said, 'Isn't my explanation simple enough? Why do you all still look so braindead?'

The livestream room was deathly silent.

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After a full ten seconds, the bullet chat slowly and tentatively emerged, like earthworms just waking up from hibernation.

"I... I feel like I understood, but also like I didn't. I feel my brain trembling."

"I get the logic, but light isn't water. How can it turn? My middle school physics teacher told me that light travels in straight lines! Streamer, do you think Newton's coffin is made of Vibranium?"

"The person above, light can certainly turn. Look up General Relativity; massive celestial bodies cause space to curve. But the problem is, how much mass can a children's car have? Can it actually bend space? Does The little brother weigh two hundred pounds?"

When Li Jiajun saw this comment, his eyes lit up as if he had found a working treasure in a pile of trash, and he clapped his hands excitedly.

"Aha! This student is half right! But we don't need to go through the trouble of warping space—that's the logic for building spaceships, while mine is just a toy." He explained excitedly, "We only need to deceive the light! This requires using something called 'Metamaterials.' By designing a special microscopic nanostructure at the atomic level that doesn't exist in nature, we can artificially control this material's response to electromagnetic waves at will, making its Dielectric Constant and Magnetic Permeability negative at specific wavelengths simultaneously—presenting a 'Negative Refractive Index' that doesn't exist in nature!"

"As long as we achieve negative refraction, we can control the propagation path of light as easily as kneading clay. Making it go around is naturally no problem. This forms a 'Visual Cavity'; the car is inside, and people outside can't see it. To put it simply, it's like putting a real-life 'Invisibility Cloak' on this car."

The more he spoke, the more energized he became, completely immersed in his grand and perfect theoretical world.

Meanwhile, the hundreds of thousands of viewers in the livestream room, after hearing terms like 'Metamaterials,' 'Negative Refractive Index,' 'Visual Cavity,' and 'Dielectric Constant'—where they recognized every single word, but the combination sounded like a divine incantation—finally gave up all struggle and thought.

"Fine, the Streamer is speaking in tongues again. My brain's CPU has already burned out."

"No, it's a toy car, and you're using Metamaterials?"

"I hereby announce this year's Nobel Prize winner in Physics: Li Jiajun! Reason for the award: Redefining the meaning of the words 'simple' and 'toy'."

"Stop struggling, family. Let's face it: we are the ones who slipped through the cracks of the nine-year compulsory education. In the ocean of knowledge, we don't even have a swim ring."

Li Jiajun glanced at the bullet chat. Seeing everyone looking 'unaware of how powerful it is but greatly shocked,' he habitually let out a long sigh. That lonely feeling of being at the top, of having no worthy opponent, surged up once again.

He once again entered that state of 'the only sober one among the drunk,' and couldn't help but mutter his inner monologue to the camera:

"Sigh, I clearly used a kindergarten-level metaphor like 'flowing river water,' so why does everyone still not understand? The knowledge level of this batch of Netizens is indeed worrying. It seems I can't count on them to learn anything from my science popularization. Forget it, I don't blame them. After all, in their world, physics might really end at 'why does an apple fall.'"

...

This 'heartfelt' self-reflection and 'considerate' comfort were like a final blow, precisely hitting the 'emotional breakdown' point of every viewer in the livestream room.

"??? It's here again! The Streamer's AOE (Area of Effect) damage is late but it always arrives! and the range seems even larger this time!"

"I'm crying. I feel like my undergraduate diploma with the red stamp was used by the Streamer to wipe the table, and he even complained it wasn't soft enough!"

"Streamer, be a human! I beg you, stop using monologues to roast us! My heart hurts so much!"

"I suspect the Streamer is PUA-ing us. First, he hits us with theories we don't understand, then he uses monologues to roast us for being stupid, and finally, he makes us feel like we're useless so we'll willingly shell out money for his 'toys' to find a bit of self-worth! I've realized it—is this what a high-end business war looks like?!"

Amidst a chorus of joyful condemnation and wails of "please stop scolding us, Streamer," Li Jiajun contentedly ended his "science popularization."

Now that the problem of being discovered by parents was solved, next up...