When Jiang Zi returned to Cassini Station with Mo Yu, Liang Jing and Wan Kai had already sent Hu Donghai's body to the warehouse and returned.

Today is the second day of the Lunar New Year, which is supposed to be a holiday, but Cassini Station is busier than usual.

Liang Jing replaced Hu Donghai and continued to sit in the P3 laboratory to observe the black ball, compared to Hu Donghai, Liang Jing was much more cautious and cautious, he never believed in any strange forces, he thought that even if there was any connection between Hu Donghai's accidental death and this black ball, then this connection must be materialistic, perceptible, and indeed exist, and they couldn't find it just because the method was not right.

Liang Jing wrapped himself tightly, he even wrapped the entire P3 laboratory tightly, it stands to reason that the P3 laboratory is an extremely safe and sealed space, but Liang Jing is still not satisfied, he has covered the walls around him with energy-absorbing composite gold leaf to block any radiation.

When the others passed by the door of the P3 laboratory, they could see Liang Jing standing in front of the glove box like a brown bear, wondering if he wanted to use the coercion of his physique to force the black ball to comply.

The chef shrugged and said that after Hu Donghai, there was another crazy one.

Liang Jing stared at the extremely thin probe and slowly made contact with the surface of the black ball, and finally tended to be stationary, but Liang Jing knew that the tip of the probe actually neither touched the black ball nor stopped advancing, but it was already so close to the surface of the black ball that it was only a few atoms away that it could not be distinguished by the naked eye.

The numbers on the display were scrolling rapidly, it was a scanning tunneling microscope, but Liang Jing didn't want to use it to observe the surface of the black ball, which had been proven unobservable by previous observations.

The numbers on the display are finally frozen at 1A.

One angstrom, which is a distance of 0.1 nanometers.

"The surface charge is zero." Dabai said.

"Strictly zero?" Liang Jing asked.

"Strictly zero." Dabai replied.

"It's really zero electromotive." Liang Jing let out a sigh, "Hell, where did all these charges go?" ”

At this time, someone suddenly knocked on the door, "Liang Gong?" Are you looking for me? ”

It's Lou Qi's voice.

"Lou Qi, you came at the right time, come and help me take a look at this computer, there seems to be a problem with the host, no matter how you shoot it, you can't shoot it well." Liang Jing beckoned to him, Lou Qi was a network engineer and computer repairman at Cassini Station, and anyone who repaired computers looked for him.

Lou Qi, who was also tightly wrapped, came over and sat down, and glanced at the computer twice, "Oh, it's a small problem, it's not a big deal." ”

"Can it be fixed?"

"No problem." Lou Qi said, "A matter of a few minutes. ”

"Okay, then I'll go to the bathroom first, you get busy first." Liang Jing packed up and went out, hurrying, "Call me when it's done." ”

Lou Qi nodded, sat down and turned on the computer, glanced at the screen, and the system crashed again, he can form muscle memory by solving this kind of problem.

As he typed the code, he looked up and looked at the black ball inside the glove box.

Under the light of the laboratory, the ball still exhibits pure blackness, not the slightest reflection can be seen, and if it is in the dark, then the ball is unobservable.

The inability to observe this property provoked another nerve of Lou Qi, so far, there is no macroscopic object that is truly unobservable, this black ball is the closest, and almost all electromagnetic waves are completely absorbed by it.

"What are you doing here?" Lou Qi asked casually, "Use a scanning tunneling microscope to magnify its surface?" What are the results? ”

"Nothing came of it."

Lou Qi stared at the ball for a long time.

"Dabai, do you say it's also a wave?"

"Waves?"

"Matter waves, according to the concept of de Broglie waves in quantum mechanics, everything is a wave, and the black ball we see should be the average of its own wave function." Lou Qi suddenly behaved like a physicist, "It can actually appear anywhere like an electron, it may be in this glove box, it may appear outside Cassini Station, or even outside the solar system, but our observations and measurements have caused it to collapse, and it will collapse in the place with the greatest probability." ”

"But in the macro world, the effect is extremely small." Dabai said, "Only in the microcosm will it be obvious, according to the basic theory of quantum mechanics, Mr. Lou Qi, as long as you repeatedly hit the wall more than 10∧160 times, there will always be one, and you will pass through the wall unscathed." ”

"Quantum tunneling."

Lou Qi is not an expert in quantum mechanics, but he was also from the physics department when he was in college, but he couldn't find a job, and later switched to a code farmer.

"Yes, that's how the microscope in front of you works." "But you also know that in real life, as long as it's not the Hulk, the probability of anyone successfully passing through the wall is infinitely close to zero." ”

"My thinking is that if we look at it in the infrared band, or the ultraviolet band, or whatever it is, then it's completely invisible to our eyes." Lou Qi had a whim, "Then will its wave function still collapse?" ”

Dabai was silent.

Lou Qi's question, it's hard to answer.

In the microscopic world, this universe is extremely complex, and even the concept of "certainty" no longer exists, not only the speed and position, but also the existence of matter itself is uncertain, particles are distributed in space in the form of waves, and a free electron can appear at any point in the whole universe, and the probability of occurrence at each point is equal.

That is, a free electron, which could appear in the solar system, could also appear in the Great Magellanic Cloud 160,000 light-years away.

But in the macrocosm, this phenomenon is impossible to exist, if Lou Qi hits the wall with his head, it is impossible for him to break his head through the wall.

But this strange black ball brings the problems in quantum mechanics of the microscopic world to the macroscopic world with its unobservable properties, and if no observer sees this black ball, then what will happen to this black ball? Think of Schrödinger's cat, the moment you close the lid, not only does it not know whether it is alive or dead, but in fact, it is impossible to determine whether it exists in the box.

"Come on, let's try." Lou Qi got the computer and threw it aside, "Just observe it in the infrared band and see what the result is." ”

He put on filter glasses so that the lenses could only pass through infrared, and adjusted the parameters of the glove box to filter out all non-infrared rays.

But the black ball is still the same black ball, it hasn't changed much, but it looks darker than before.

"Mr. Lou Qi, you are also an observation, you can't see it itself, but you can see traces of its existence, if you really don't observe anymore, then you should leave the laboratory and close the door." "I reminded you that in the macrocosm, this effect is so small that it is completely negligible, and even if you observe it in the infrared band, the probability of it suddenly disappearing is even smaller than the probability of winning the 20 billion year lottery jackpot in a row." ”

Lou Qi groaned and shook his head.

"No, no, besides me, you're also observing."

"Mr. Lou Qi?"

"There are two observers in this room, besides me, and so are you." "As long as you keep observing, then its existence must be certain, so let's try to see what it would be like when there was only one observer." ”

"So what do you need me to do?" Dabai asked.

"Get out of here." Lou Qi said, "Dabai, I need you to leave here temporarily and turn off all monitoring tools in the laboratory. ”

"Mr. Lou Qi, I don't recommend you to do this."

"It's fine." Lou Qi said, "It's okay for a while, you can come back later, nothing will happen in the daytime, and Liang Gong will come back later." ”

"Ten minutes." Dabai said, "Then I'll give you ten minutes, and I'll be back in ten minutes." ”

"OK, no problem!" Lou Qi raised his right hand high and made an OK gesture.

Da Bai left the laboratory, and turned off all the instruments in the laboratory as he left, the red, green, and green indicator lights went out in turn, and all the sounds slowly disappeared.