Global Trial

"How do you see it?" Cen Heng was stunned, "Didn't you say that this is a material with a negative refractive index, which transforms the optical structure and changes the direction of the light that shines on it, forming a black hole and can't see anything? Like that... the vector changes, are you sure there is still a way to crack it?"

"If there is no way, there must be a way." Xia Mingdong shrugged, "It won't be that there is no way to crack it, calm down."

As he said, he wanted to take the invisible paper from Ning Ge, and Ning Ge handed it to him when he saw that there was no danger.

"...I can't calm down." Cen Heng was speechless, "Your fourth son, you first mentioned an optical black hole, saying that it is impossible to achieve with our current technology, and that you let us crack something that all human beings have not made." , is this still okay?"

"Hmm." Xia Mingdong said lazily: "The dungeons we came to Chuang couldn't get better. How can the series of dungeons, Mr. Chief Trial Officer, be simple? In fact, there is not a very simple solution, but I think everyone Probability not."

The props obtained in the last dungeon clearly stated that they could be upgraded. He guessed that if he could clear all the dungeons of the Chief Trial Officer and collect all the reward props, the energy change would lead to a qualitative change.

Although I can't summon Shenlong or anything, but...

It should be able to help them leave the trial world.

"What method are you talking about?" Although Cen Heng heard Xia Mingdong say no, he was also very curious, "What kind of... weird method?"

"We can't see it." Xia Mingdong said with a smile, "But it doesn't mean that Master Trial Officer 5761 can't see it."

Xia Mingdong has never been in awe of the trial officer. When he said the word "Master", he always felt that it was very unsuitable, "If we try to get his eyes, then we will be able to see them?"

5761's infrared-like eyes flickered frantically. His body was made of metal, and he had no hair at all, but at this moment he had a "creepy" feeling similar to that of a human being.

"You, you dare to play the trial officer's idea!" 5761 shouted, "You will be punished by the trial rules!"

Xia Mingdong said nonchalantly, "It's not the first time I've wanted to be a trial officer, just get used to it, I've been playing for so long, and I haven't seen what the trial world has done to us."

Cen Heng and the others were collectively shown fearlessness by Xia Mingdong. Cen Heng, who was very scared at the beginning, is no longer afraid, and even asked curiously after hearing it: "Fourth, we can't see it, so why can infrared rays make images?" ? You know, I'm not very good at science..."

Ren Sheng looked at Xia Mingdong with a paralyzed face. Although he didn't say it directly, he didn't know what he meant and was curious to know, he was different from Cen Heng.

Cen Heng is not good at science, he has never studied science at all.

"The principle of infrared imaging is very simple. Any object with a non-absolute zero temperature will radiate infrared rays of different frequencies and wavelengths. As long as there is radiation, there will be imaging." Xia Mingdong explained, "As long as it is an object, it cannot escape."

Cen Heng endured it, and still took the initiative to show his low IQ, "Well, what does absolute zero mean?"

Xia Mingdong twitched the corner of his mouth: "Do you remember PI?"

Cen Heng bit the bullet and said, "That, 3.1415..."

Ning Ge continued coldly: "926535..."

Cen Heng looked at Ning Ge in horror, oh my god, cats can memorize pi in this world, so what qualifications does he have for not working hard.

If you don't work hard, even a cat's IQ is not as good as it is.

Xia Mingdong "tsk tsk" twice, "It's ok, I need someone's help to memorize pi."

Cen Heng: "..."

"Absolute zero is the lowest temperature in thermodynamics, minus 273.15 degrees Celsius. At this temperature, the kinetic energy of object molecules is zero." Xia Mingdong said, "Of course, with current human technology, absolute zero can't be reached, it's just a theoretical value. Just like the Klein bottle mentioned before, it only exists in human theory."

"Okay, then let's talk about something practical." Cen Heng touched his nose, "Don't talk about these illusory and unreachable things, how can we see things on this piece of paper."

"Let me think about it..." Xia Mingdong whispered, "I have some ideas, but it may not work."

"Then think about it slowly, and I'll see if there are any other clues." Cen Heng imitated a blind man touching stones, and began to feel in the laboratory again.

Xia Mingdong lowered his head and thought for a moment, seeing that Ning Ge was still standing beside him, he couldn't help leaning over to ask in a low voice, "By the way, where did you know pi, can cats learn it too?"

Ning Ge's expression was indifferent, and he didn't speak.

"Say it." Xia Mingdong smiled, his eyes were crooked, his brows were clear and soft, and his black eyes were shining with tiny gleams.

Ning Ge was silent for a moment, then said softly: "The couple had a son in the past, I heard from the other party."

As soon as he heard that Ning Ge knew about it before, Xia Mingdong immediately stopped asking, and said in a low voice, "Sorry, I shouldn't have asked."

"It's okay." Ning Ge's voice was calm, "You don't need to apologize to me."

Xia Mingdong stopped talking, stopped joking, and simply said to the others: "Since optical invisibility is the principle of refraction, why don't we use refraction to try it out, a dead horse is a living horse doctor."

Cen Heng fumbled halfway in the laboratory but couldn't find anything. He heard Xia Mingdong's words and immediately came over, "How to try?"

"Use this." Xia Mingdong took out a bottle of water from his body.

When he came to the dungeon, he guessed that it might be the same as before, and he couldn't use the points store and some props, so he deliberately brought water and food with him.

Cen Heng looked at the bottle of water in Xia Mingdong's hand, "You mean... water? My ancient memory still has the story of the chopsticks inserted into the water that the teacher told us in the physics class. Put the chopsticks in the water, It's like breaking in two, it's the refraction principle of light."

"Father is very pleased." Xia Mingdong put the "Emperor's New Clothes", that is, the invisible piece of paper on the test bench, "You can finally understand what I mean. Light travels from one medium to another. Refraction will occur when the water is refracted, and the refraction of water may reflect these words, isn’t it just playing with refraction, let’s use refraction to try it.”

Xia Mingdong is not sure whether this method is useful. After all, 360° optical invisibility is still in theory at this stage on the earth. At present, optical invisibility in a specific direction can only be realized in the laboratory, and he does not know how to crack it.

"Wait." Seeing that Xia Mingdong really wanted to unscrew the mineral water and pour it on the paper, Cen Heng couldn't help but grab Xia Mingdong's hand, "Fourth, you're sure it's okay, the paper can't resist being flooded..."

Cen Heng couldn't continue speaking, and silently let go of Xia Mingdong's wrist.

Ning Ge stood beside Xia Mingdong and directly pushed Cen Heng away.

Xia Mingdong smiled, "What made you have the illusion that this thing is paper? The metamaterial with a negative refractive index is paper, which is not water-resistant? That is absolutely impossible. If ordinary paper can become invisible, what kind of metamaterials are human beings still studying? Things just have the feel of paper, definitely not real paper."

Cen Heng: ...It seems very reasonable.

Xia Mingdong didn't care anymore, he simply opened the mineral water bottle and poured it directly on the "paper".

5761 was terrified when he heard it. How did he feel that these testers... slowly found the real clue in the dungeon?

There are some strange things that cannot be explained by human science at present.

The water droplets did not gather and slide off the test bench, but spread out like a water net and covered the test bench.

But if you look at the same level with the table, you can see that the water net is not attached to the test platform, but floats on the test platform like a suspension.

Ren Sheng murmured, "Technology is really magnificent and mysterious."

"I think so too." Xia Mingdong said, "Everything humans know is just a drop in the ocean."

He stood in front of the test bench, looking down at the water net.

The bright light is refracted through the water net, layer by layer, like ripples, and the lines of writing slowly appear.

Like the infinite mystery of the Creator, these words seem to be floating on the water net.

Cen Heng stared blankly, "Is this... really, refraction?"

"Is it still diffraction?" Xia Mingdong joked casually, "Of course it's refraction, but it's not refraction that we can understand."

The handwriting on the paper is very simple, only a few short lines——

DARPA: Negative Index Materials Instrument, green on, red on pause

SF: soft materials instrument, green start, red pause

Test bench metamaterials: raw materials

Cen Heng: "...That's it, it's over, just tell us how to use the instrument? What kind of negative refractive index materials and soft materials do you want us to make?"

"Congratulations, I think you guessed it right." Xia Mingdong looked at the instruction manual, "It should be for us to use the materials produced by these instruments to find inventions and creations."

"But what's the use of negative refractive index materials and soft materials?" Cen Heng scratched his head, "I know negative refractive index is optical invisibility, but we..."

Cen Heng paused, but did not say that the invention they were looking for was probably optical invisibility, "Why do you want to make optical invisibility? And this soft material, what is this used for?"

After he finished speaking, he saw Xia Mingdong looking thoughtfully at the experimental instrument with "SF" written on it.

SF: Soft-Material

soft material...

Xia Mingdong always finds this term very familiar.

Ning Ge stood beside him, watching him frown, and asked in a low voice, "What's wrong?"

"I always feel familiar." Xia Mingdong pursed his lips and said, with a rare serious expression, "I should have seen it before, but there are too few related reports, so I didn't remember it."

He closed his eyes and used his talent directly.

From the moment he entered the dungeon, the images flashed past his eyes frame by frame. 5761, many materials, two huge instruments, and the words on the water net circled in his mind, forming a perfect thinking hall.

He panted and opened his eyes, eager to say something, but he didn't realize that Ninge had already fed the nutrient to his mouth.

"I know what it's for."

The author has something to say:

Feeling...too complicated

In the next copy, let’s write some knowledge that everyone can understand.