Global Trial

Seeing Xia Mingdong's familiar smile, Cen Heng asked, "Fourth brother, what are you planning?"

"Isn't it always possible to take away the things in the dungeon?" Xia Mingdong walked to the front of the instrument, with a lot of intentions, "If I can make optically invisible things here, then we can take them away in the future." Isn’t it very useful when passing dungeons, checkpoints or conflicts with other trialists?”

...seems to make sense.

5761 was angry: "How dare you take away the contents of the copy of the Chief Trial Officer!"

"Why, aren't the rules allowed?" Xia Mingdong raised his eyebrows and said calmly, "I'm just using the rules reasonably."

5761:"……"

Hell, he really can't say no to rules.

Because... the rules are okay.

"Then we can leave after making things?" Cen Heng said, "I still feel that if we touch it a little bit, we can always find it."

Xia Mingdong pointed to the three to four meter high ceiling, "I leave it to you."

"Then what, ahem." Cen Heng said, "Don't we still have a sports car?"

Xia Mingdong chuckled, "Are you sure the laboratory is wide enough for a sports car?"

Cen Heng: "... also."

Therefore, we should continue to invent and create honestly.

"What exactly are we going to invent?" Cen Heng asked.

Xia Mingdong replied in the trial system: It's the same sentence, first look for the instruction manual, and then say it again

Cen Heng: How to find the manual

Xia Mingdong: Use your method

Cen Heng:?

Xia Mingdong: A little bit of exploration

Cen Heng: ...

The reason why Xia Mingdong dared to say this was because the instructions, as a guide for inventions and creations, were related to their tasks. If there were any, the method to obtain them should not be difficult.

Invention and creation is the ultimate goal of this dungeon, and creation will not be shown to them so easily.

If there are clues in the dungeon, it must be the use of equipment or materials.

All four of them started to cross the river by feeling for the stones, during which Xia Mingdong whispered to Ren Sheng, "Go and smell what 5761 smells like."

Ren Sheng: ...?

Xia Mingdong said quietly: "Maybe there is the aura of the Chief Trial Officer, aren't you curious?"

Ren Sheng: I'm really curious...

But just can you not make the most of everything.

Ren Sheng complained in his heart, he still smelled 5761 in the past.

5761 saw some testers passing by him, thought they were rummaging in the laboratory, didn't pay much attention, and didn't know that he had been heard.

After Ren Sheng came back, he said to Xia Mingdong, "I don't think there's anything different, it smells like metal."

"The next step is the next step." Xia Mingdong patted Ren Sheng's shoulder, "Look for things in the laboratory based on the smell on 5761's body, and look for things he touched."

Ren Sheng: ...?

I always feel like I've been played again.

But Xia Mingdong's thinking, ahem...

It seems right.

Assuming that the dungeon is managed by 5761, then the things in it are also placed by 5761. There is nothing more scientific than following 5761's scent trail to find things...

Weird.

Ren Sheng complained about being used like a dog with a paralyzed face, while earnestly looking for things based on the smell.

The smell in the laboratory is very messy, the smell of 5761 is everywhere, but as long as you walk, it will leave traces, and the depth of the traces will be different. He stopped in front of a certain test bench along one of the traces of the smell.

There are some metamaterials on the test stand, and underneath is the cabinet, which they opened just now, and it's empty.

But maybe...the stuff in here is also optically invisible.

Xia Mingdong opened the cabinet and wanted to reach in to touch it, but Ning Ge held his hand and said in a low voice, "I'll do it."

Xia Mingdong rubbed his nose, "Actually, I don't think there is anything in the cabinet that can pinch your hands, don't worry."

Ning Ge gave a soft "hmm", and still stretched out his hand. Looking from the side, he lowered his eyelids slightly, with a calm and indifferent expression.

"How is it?" Xia Mingdong asked nervously standing beside Ning Ge, "Have you gained anything?"

Ning Ge withdrew his hand from the cabinet. He seemed to be holding something in his hand, but none of them could see it. They just felt that the movement of Ning Ge's hand was a little strange.

Xia Mingdong smiled: "Is this the reversed version of the Emperor's New Clothes? You can't see it, but it really exists."

He reached out and tried to touch the thing next to Ninge's left hand, and found that he could really touch something like paper.

Xia Mingdong was about to touch it carefully, when someone grabbed his wrist suddenly.

Ning Ge said indifferently: "Don't touch it."

Xia Mingdong: "?"

Ning Ge: "This doesn't seem to be a book, it's just a piece of paper."

Cen Heng scratched his heart and lungs beside him, especially curious about what this invisible thing could be touched by the naked eye, but because of Ning Ge's usual prestige, he didn't dare to go up and ask, so he could only stare wide at the side. Look carefully.

But no matter how wide he opened his squinted eyes, he couldn't see anything.

"Fourth, this is what you said... optical invisibility? What is the principle?"

Xia Mingdong's eyes fell on the negative refractive index material he had seen before.

"In my opinion, it should be based on metamaterials with a negative refractive index, which transforms the optical structure so that all the light that hits the object is redirected, forming a veritable optical black hole. Objects cannot refract light, so we naturally cannot see it."

5761 suddenly expressed a sense of presence: "What did you all find out?"

Xia Mingdong smiled: "Why did we tell you?"

5761:"……"

Cen Heng has already learned to ignore the trial officer, and asked Xia Mingdong directly: "Fourth brother, did this kind of technology exist on Earth before?"

"To tell you the truth." Xia Mingdong smiled, "The current technology of the earth can only achieve optical invisibility in a specific direction, and cannot achieve 360-degree blind angles, just like the optical invisibility of Harry Potter's invisibility cloak, so This is outside the scope of knowledge and technology currently available on Earth."

Cen Heng felt his heart beating fast, "Then if we take this out..."

"Good idea." Xia Mingdong praised, "But first we have to get out."

Cen Heng: "..."

A basin of cold water was poured down.

5761 said incredulously: "You actually want to take away the inventions of the Chief Trial Officer? Are you going to kill yourself?"

Xia Mingdong smiled and said, "Of course, so we are walking a tightrope."

After listening for so long, Ren Sheng asked a question silently: "If this dungeon is only related to optical invisibility, why are there so many visible materials on the table?"

Existence is reasonable.

Applied to the trial dungeon, it is useful even if it exists.

There must be a reason for those materials on the table not to be arranged uselessly.

The metamaterials involved in this copy may not only have negative refractive index materials, but also other metamaterials.

"So, we have to find a way to know what is written on this piece of paper before we can infer the role of those materials on the table."

The author has something to say:

Looks like another weird dungeon QAQ