The weather was gloomy, and there was a sense of unease in their hearts, and this feeling haunted them.

The dark clouds in the sky glow with purple light, and if there is an energy decay meter, you will find that the dark clouds in the sky are not dark clouds, but an impurity formed by energy, which covers the entire sky of Changping, leaving no gaps.

Let the earth have a faint purple.

"I feel like we're in trouble......"

Huang Ying stood in front of the tent and muttered to Jiang Qi on the other end of the phone, "It's really a coincidence." ”

"I'll go find you......"

Jiang Qi on the other end of the phone was silent for a while, and suddenly said.

"No need ......"

Huang Ying stopped Jiang Qi, and then said: "If it is to transfer the tiger away from the mountain, it will not be good, you stay there first, if there is a problem...... "I will contact you......

"Toot ......"

Suddenly, the phone hung up by itself, Huang Ying glanced at the phone in surprise and found that there was no signal.

"What's wrong? Captain Huang! ”

Li Yulong on the side also looked here with some fear, he originally felt that the weather was very wrong, and now Huang Ying came to such a hand, which was even more frightening.

But Huang Ying just glanced at him, and then took out the communicator, only to see that there was no satellite contact on it, and there was no contact with the outside world.

"Is there a cell phone signal?"

Suddenly, Huang Ying looked at Li Yulong and asked out loud.

"Mobile ......"

Li Yulong heard Huang Ying's question, although it was very strange, he still took out his mobile phone, but it was magically displayed that there was no signal.

“…… Okay, I got ......"

Seeing Li Yulong's surprised expression, Huang Ying already knew what was going on, so she took two steps forward, looked at those who were still working, and said, "Let them come back first, after all, life is important." ”

"I see."

Li Yulong immediately left Huang Ying's side, went to find those staff, and asked everyone to gather temporarily, compared to his life, what can he do if he works one day less? If it really doesn't work, it will be regarded as a holiday.

"Looks like I'm a little wrong in my estimation......"

Looking left and right, Huang Ying said with a frown.

However, in Gaoyang City, a speck of light flew towards the horizon at a very fast speed.

……

"Gravitational waves confirmed! Nobel Laureate in Physics ......"

Cheng Yu couldn't help but be a little stunned when he looked at the news that successfully squeezed out Sero's reappearance.

Gravitational wave? He remembers hearing his teacher mention it once when he was in school.

Gravitational attraction is considered to be an effect of the curvature of space-time. This bending is caused by the presence of mass. In general, the greater the mass contained in a given volume, the greater the resulting curvature of space-time at that volume boundary. When an object with mass moves in space-time, the change in curvature reflects the change in the position of the object. Under certain circumstances, an accelerating object is able to change this curvature and propagate outward at the speed of light in the form of a wave. This propagation phenomenon is called gravitational waves.

When a gravitational wave passes through an observer, the observer will find that space-time is distorted because of the strain effect. When gravitational waves pass through, the distance between objects increases and decreases rhythmically, and this frequency is the frequency of the gravitational waves. The intensity of this effect is inversely proportional to the distance between the sources that produce the gravitational waves. The orbiting binary neutron star system is predicted to be a very strong source of gravitational waves when they merge, due to the tremendous acceleration they generate when they orbit each other in close proximity to each other. Due to the fact that they are usually very far away from these sources, the effect when observed on Earth is very small, with a deformation effect of less than 1.0E-21.

Since the gravitational field equation is highly nonlinear, we usually use the theory of linear approximation for ease of calculation and based on practical approximations. Think of the gauge of space-time as a small quantity, that is, adding a little perturbation term to the straight space-time.

You may not understand, their teacher once compared Jack and Ruth in "Titanic", and the reason why they are attracted to each other is not only because of love, but also because of quality.

In Einstein's description, an object with mass distorts space-time around it, and the greater the mass of the object, the more space-time is distorted.

If you look at space-time as a large piece of rubber film, and you put a Ruth on it, then her mass will press the rubber film down, and you can see this scene by placing a Jack next to it:

Since I can't afford to invite these two stars, I have to use steel balls instead.

It can be seen that the space-time bending caused by Ruth Ball and Jack Ball respectively caused the two of them to gradually roll towards each other and finally get close (what is wrong). Of course, when asked by your partner "why are you attracted to me", if you answer "because you are important", you will bear the consequences.

The same is true of the relationship between the sun and the earth, except that the sun is much more massive than the earth, and the space-time distortion caused is also greater, so it seems that the earth is revolving around the sun - according to the general theory of relativity, "gravity" is just a phenomenon that is inevitably brought about by the distortion of space-time.

However, the gravitational wave was confirmed, which couldn't help but surprise Cheng Yu.

"What's wrong?"

Ding Yunfeng walked to Cheng Yu's side, found that Cheng Yu's mood was a little wrong, and asked.

"Gravitational waves have been confirmed ......"

Cheng Yu said as he watched the news for Ding Yunfeng, and there was still a little excitement in his eyes.

"That's a good thing......"

Even when Ding Yunfeng saw it, he couldn't help but be stunned for a moment, this news was really too sudden, and said: "The last blank in its astronomical observations. The characteristics of gravitational waves allow it to provide information that would otherwise be unavailable. Gravitational waves are waves produced by mechanical motion, which reflect changes in the distribution of mass; Since gravity is the weakest of all interactions, this makes gravitational waves extremely difficult to generate and detect, and on the other hand, it also gives them the strongest penetrating power, even stronger than neutrinos. ”

Ding Yunfeng said as he made himself a cup of coffee and finished speaking.

"Commander, you know so much?"

Cheng Yu looked at Ding Yunfeng with some surprise, and sighed, Ding Yunfeng is usually only strong in his insight and command, but he really didn't expect that Ding Yunfeng said that he hadn't thought about it.

"It's okay......"

Ding Yunfeng took a sip of coffee, and then said: "My wife is one of the people in charge of researching this plan, but I really didn't expect it to be successful." ”

"Really?"

Cheng Yu's eyes lit up, what he cared about was not any plan, but Ding Yunfeng's wife, this was the first time in such a long time that he had heard Ding Yunfeng mention his wife.

Cheng Yu, a kid who has never even been in love, how could he not be curious, but when he was about to ask, Ding Yunfeng suddenly looked at him, his eyes narrowed, and there was an unknown meaning.

"Forehead ......"

I don't know why, Cheng Yu held back all the words in his mouth, scratched his head in embarrassment, and said, "That, the effect of gravitational waves doesn't feel very big......"

Bah! He himself subconsciously said a sentence, but he actually said such nonsense, let me ask when the ancients set off fireworks, did they ever think about today's nuclear bombs?

In the process of civilization evolution, a very small thing is likely to become a crucial issue, so Cheng Yu felt that his words were so stupid.

"To prove it, it is nothing more than to make the theory of relativity more solid, as for our ......"

Ding Yunfeng crossed his arms and paused, and after a while continued: "I still don't know much about this piece of comprehension, so I can only go down step by step. ”

“……”

After Cheng Yu heard this, he nodded, then closed the news interface of gravitational waves, and then prepared to start his work.

The new program will soon be put into use, and for the main designers, Cheng Yu will not be able to relax any opportunity to check.

"Command."

At this time, Han Yi suddenly walked in, his steps were very hurried, he said hello to Ding Yunfeng, then looked at Cheng Yu, and said, "Help me contact Huang Ying, I can't contact her." ”

"Oh!"

Cheng Yu looked at Han Yi in surprise, laughed a little teasingly, and said, "The captain is also a little too much, right, do you have to show affection at work?" Pity us single dogs. ”

“……”

The corners of Han Yi's mouth twitched, and he looked at Ding Yunfeng, it's all this guy, making this kid so big and small.

"What do you want me to do? I'm not a single dog. ”

Ding Yunfeng could probably guess what Han Yi was thinking, but Ding Yunfeng was Ding Yunfeng after all, so he turned his head directly and didn't look at him.

"Hurry up and ......"

Han Yi helplessly held his forehead, and then said to Cheng Yu: "I can't get in touch suddenly, I'm a little worried." ”

"Got it!"

Cheng Yu smiled slightly, and his fingers quickly operated on the keyboard.

"Alright, you two ......"

Ding Yunfeng walked over, patted Han Yi on the shoulder and said, "If you show affection again, Xiao Chengyu will be unhappy." ”

“……”

Han Yi's face was full of question marks, he didn't show off much, not only him, Huang Ying himself was also because of work, and rarely had the opportunity to meet, even if they were alone, the two of them didn't have sticky attributes, at most they just went out to talk, at most they just held hands, why did they show off? The world of single dogs, forgive him for not understanding.

"That's not right!"

At this time, Cheng Yu suddenly exclaimed, causing them to turn their attention to him.

"What's wrong?"

Han Yi immediately leaned down and looked at the computer screen, which said "No contact"!

"Can't be reached."

Cheng Yu kept repeating the attempt, and after the last attempt, Cheng Yu raised his head, looked at them with puzzlement in his eyes, and said, "I can't contact them." ”

"How so?"

Han Yi immediately got up, looked at Ding Yunfeng, and said, "I ask to go to Changping." ”

"You calm down first."

Ding Yunfeng looked at Han Yi for a moment, motioned for him to calm down, and then asked Cheng Yu, "What happened?" How could the communication system of the night attack not be contacted? ”

"This ......"

Cheng Yu quickly traced the wrong stage of the system, but he was also stunned, and said a little dumbfounded: "No signal......

"What?"

Han Yi's eyes widened, in the current era, how could there be no signal, it was only counted a few times, without exception, it was all caused by the appearance of monsters.

"Captain Huang Ying, there is no signal in that area."

Cheng Yu operated quickly, and after a while, he suddenly posted a video on the main screen, while saying: "This is an image taken by a nearby satellite." ”

Han Yi and Ding Yunfeng, the members of the entire command room, all looked at the main screen, and it didn't take long for a picture to appear on the main screen.

It's normal traffic, it's normal high-rise buildings, it's normal people, and those people are a little abnormal in that they all look up at the sky.

I saw that the sky was covered with purple clouds, and the whole earth had an ominous feeling, and at that angle, the edge of the dark clouds could be seen.

"Is this cloud blocking the signal?"

Cheng Yu looked at the cloud a little uncertainly, after all, he was looking for the nearest city with a signal to Changping.

"Captain!"

Han Yi looked at Ding Yunfeng, no matter what, Huang Ying might really be in danger, he couldn't ignore it.

"Attention all staff."

At this time, Ding Yunfeng spoke, only to hear him say: "Departure to Changping, be careful." ”

"Understood!"

The team members picked up their helmets and ran out, including Han Yi, who was the most anxious.

"The place where we set off this time is very likely to cut off the connection between us."

Ding Yunfeng used the radio to communicate with the team members who got on the plane, and walked behind Cheng Yu and said: "If this happens, it is up to you to make your own judgment, remember, calm down!" ”

If the signal can really be cut off, will the communication between the players also be cut off? Ding Yunfeng can't bet!

(Gravitational waves are in physics, gravitational waves refer to ripples in the bend of space-time, propagating outward from the radiation source in the form of waves, which transmit energy in the form of gravitational radiation, and Einstein predicted the existence of gravitational waves based on the general theory of relativity.) The existence of gravitational waves is a consequence of the Lorentz invariance of general relativity, as it introduces the concept of a limited propagation speed of interactions. Gravitational waves, by contrast, cannot exist in Newton's classical theory of gravity, which assumes that the interacting propagation of matter is infinite. Of course, it doesn't matter, they just discovered the existence of gravitational waves, but in terms of application, they are not as good as us, at least we know how to use them.

In my understanding, at present, it should be astronomical observations, such as black hole mergers, supernova explosions, and so on.

Put gravitational waves here.,It's just just in case.,Mainly because I'm worried about the long-term perspective of the plot later.,After all, human beings can't just stay on Earth.,The only difficulty is.,How does the protagonist go to the universe...... It's not that I'm worried that he won't be able to go, but it's the reason, otherwise I would really plan a plot like that, everyone has a good idea, you can talk about it. ）

(Also, today's mentality is a bit explosive, because my classmates watched LOL's league, and I swore that RNG was very likely to win, and SKT won...... ）