Volume 4: Spacetime Singularity Chapter 29 The Color of Black Holes
Whether it is natural selection or survival of the fittest, as human beings, it is impossible for us to sit and wait to be eliminated.
Although it is the law of nature that advanced life replaces backward life, humans have fought against many natural laws since the birth of civilization, and this one is not the only one.
Although this may be the first time we need to rely on the power of extraterrestrial life.
Why do we say it is possible? Because we cannot guarantee that human technological development in the past did not receive help from aliens. There are so many strange things in the history of science and technology.
According to von Neumann's idea, if there really is an advanced civilization that is far superior to human development and wants to influence the earth without making any noise, it would be completely impossible for us to discover it.
The success or failure of detecting aliens does not depend on humans, but on a more advanced civilization. On the other hand, aliens may have contacted humans countless times in history, and most people have no idea about it.
Fang Cheng took out the cylinder that he had put back in his pocket earlier, and according to the method that Observer No. 1 had told him, he held it with one hand against the side facing him and slowly twisted the front end with the other hand.
The cylinder expanded into a huge circular umbrella that flashed the same green fluorescence. Its radius of curvature was very large and the arc was basically invisible.
The umbrella grew larger and larger as his fingers moved, and finally completely enveloped the two of them. At this moment, Ning Yu'an had completely hidden behind Fang Cheng.
"Is this the artificial black hole you mentioned before? It feels very different from the black hole I remember."
"What do you think it is like... We have never seen a black hole..."
“Hey, wasn’t there a photo of a black hole before? It’s the orange ring that looks like a donut.”
"That's not a picture of the black hole itself. Strictly speaking, the orange halos are photons produced by the violent interaction of matter in the accretion disk. And in theory, photons cannot escape from a black hole. A real black hole should be pure black if it can be seen with the naked eye."
“Is that dark shadow in the middle of the orange a black hole?”
"That's not the case either. The black mass is mostly the shadow of the black hole. If the black hole really exists, its size is only a few pixels in the picture."
Ning Yu'an nodded thoughtfully. She leaned her head out from behind Fang Cheng's shoulder and looked at the white shadow that was growing bigger and bigger in front of her. This huge plane flashing with fluorescent light was dazzlingly bright. It couldn't be said that it looked exactly like the halo in the black hole photo. It could only be said that they were completely unrelated.
"Wait a minute, what do you mean by 'if that black hole really exists'? It has been photographed, so is it possible that it doesn't exist?"
"Yes, for now, all black holes are just black hole candidates, and none of them have been truly confirmed. We can only say that there is 'a lot of evidence' to prove the existence of black holes, and that it is consistent with theoretical predictions, but we cannot say that black holes have been observed."
Fang Cheng turned around and glanced at the girl behind him. The confusion on her face didn't seem to be fake.
"Some people think it may not be a black hole, but they can only say it may be an extremely dense celestial body, but they can't say what this extremely dense celestial body is."
The fan in front of them had completely blocked the vision of the two people. Fang Cheng stopped the hand that was rotating, grasped the rear end of the cylinder with the other hand, and stretched it forward.
The barrier in front of him began to flicker, and the frequency of flickering was increasing. Fang Cheng swallowed hard and squinted his eyes. Even though he turned his head, he was still a little dizzy by the scene in front of him.
Ning Yu'an completely shrunk her head behind the boy. The light from the screen became more and more dazzling. Even if she closed her eyes tightly, she could still clearly feel the changes in light and darkness in her field of vision.
"When will it get better? I feel so uncomfortable now."
"Just wait until it finishes flashing..."
Before he finished speaking, both of them heard a "whoosh" sound, and then the light from the fan completely dimmed.
The entire fan shrank rapidly, and Ning Yu'an was stunned when he saw the scene behind it.
The large black shadow that had just been standing there completely disappeared.
“So amazing…”
"According to the aliens, this thing is a space weapon. I used it once when I brought you here just now."
Ning Yu'an didn't say anything. She saw that the silver umbrella had completely shrunk back to the size of a cylinder.
"According to the aliens, a micro black hole with a very small Schwarzschild radius is embedded in its front section, but the event horizon is very large, so once the shielding is lifted, it will suck in all the surrounding matter."
"Um, what does vision mean..."
"You can think of it as the 'attack range' of a black hole. Everything inside it will be sucked in, including light."
Theoretically, this process only takes a very short time, a true instant.
"Wait a minute, then how come we're okay?"
"This black hole is directed at the space on Earth. Although gravitons can travel through different spaces, our space is shielded by the dark energy layer covering the umbrella."
That umbrella is there to protect the user.
Ning Yu'an was confused and could only nod. Whether it was this space or that space, her mind was now a mess.
Seeing that Fang Cheng seemed to want to continue speaking, she asked.
"I don't quite understand this space... I've heard of a term called tunneling before. Is it the same concept as that?"
In fact, she had heard the word tunneling from the person in front of her before. At that time, Fang Cheng talked about a lot of things like quantization and painting scenes, and she only remembered the word tunneling.
“It’s not quite the same. Tunneling is within the same space. For example, a microscopic particle in a three-dimensional space passes through a wall in the same three-dimensional space. This wall is generally called a potential barrier.
But the gravity here breaks through to another orthogonal space. It's like we put a dot on a piece of paper, and the gravitons released from that dot penetrate the paper and hit the outside..."
Ning Yu'an nodded thoughtfully, but now her mind was full of the Taoist priest of Laoshan, so she was not listening at all.
"But this thing has a CD, so the interval between removing the shield can't be too short. But the monsters are pretty far apart, so walking speed is just enough to cover that time."
"If we have to go to every place, how long will it take in total?"
"I don't know either, because there is no time reference right now. I can only judge by the state of this cylinder. When its cooling time is over, a shining green light will appear on it."
As Fang Cheng spoke, he gently threw the column upwards. After spinning a few times in the sky, it landed steadily in his palm.
