I really don't want to lie down and win

quickly,

Xiaoman cleaned up the table and left the office with a bunch of lunch boxes. Looking at the leaving back, Xu Mang didn't know what to say for a while, and she gradually leaned towards the image of Mrs. Xu imperceptibly.

in the afternoon,

Xu Mang and Brother Chuanxiao still conducted a series of explorations and discussions on this black hole. The question now is how to let the audience distinguish between the outside of the black hole's event horizon and the inside of the event horizon. The bright band of vision.

However, this idea was rejected by Brother Chuan Xiao. Judging from the photo of the real black hole, there is no so-called bright band here.

To clarify this issue,

Xu Mang and Brother Chuan Xiao conducted a lot of research work, and finally figured out the basic situation of the bright band. The black hole in the photo above has an accretion disk that is physically very thick, but optically very thin. Radiation can pass through basically unimpeded.

Then when designing the black hole in the movie, the opposite structure can be adopted. The accretion disk is physically very thin, but optically very thick, and radiation cannot pass through it, thus solving this problem.

of course,

A lot of everything is just staying in the mind and the computer, and a real example is needed for reference, a black hole with a mass equivalent to [-] million times the sun.

Xu Mang and Brother Chuan Xiao set their sights on M31, the Andromeda galaxy about 254 million light-years away from Earth.

According to the detection of astronomers, there is a supermassive black hole in the middle of the Andromeda galaxy, with a mass of [-] million times the mass of the sun, which basically meets the requirements in the movie, but this is only in terms of quality.

The data research on the big black hole in Andromeda finally determined the type of black hole in the movie, and it was moved over intact.

"Brother Chuan Xiao?"

"Since a black hole can affect time, then...if a person stands on the edge of a black hole for a year, how will he calculate the time after he returns to Earth?" Xu Mang asked with a smile.

"..."

"This... I really don't know, maybe the Milky Way is gone." Brother Chuan Xiao laughed.

"Actually, the script is pretty good."

"I reckon I found a scientist to act as a scientific advisor." Xu Mang said seriously, "The universe is divided into two independent time and space, outside the event horizon and inside the event horizon. I have no objection to that."

"Besides, there is no need to doubt the time close to the horizon...it must be slower than the time on the earth. How much slower depends on the screenwriter's ability to make up." Xu Mang said seriously: "But the time inside the black hole, This science consultant has a problem with his fantasy ability, and the time dilation effect should not be used, but the time visualization effect."

Visibility?

This...

Do you have the concept?

Brother Chuan Xiao looked confused, it was the first time he had heard of this visual effect of time.

Then,

Brother Chuan Xiao heard the most absurd thing in life. In Xu Mang's fantasy inside the black hole, time can be observed, that is, the past, present, and future can be seen, and gravity can even be used to change the future.

According to Xu Mang, anyway, everyone couldn't understand the definition of black hole time, so they went straight to the bold imagination.

But according to the general theory of relativity, a time is chosen inside the black hole to enter, and this time can only be the corresponding time point after entering the event horizon. This is to prevent the occurrence of the grandmother paradox.

In order not to let the time be wrong.

"Xu Mang?"

"Okay!" Chuanxiao laughed and said, "Your science fiction skills are very strong!"

Xu Mang smiled, and said calmly: "Actually, it's all nonsense. You and I both know that entering a black hole means death. Why don't we imagine the interior of this black hole to be more beautiful."

"Then how to shuttle?"

"..."

Xu Mang's pretentious soul, which was burning just now, was extinguished by brother Chuan Xiao in a moment.

"It's all come to this point... just press a wormhole forcibly, it's a sci-fi movie anyway... the screenwriter will try his best to rationalize it." Xu Mang laughed: "And I looked at the previous plot, and there are also About using wormholes to travel through time and space."

"Furthermore, Einstein's definition is instantaneous space transfer or time travel." Xu Mang said seriously: "There is no need to discuss this matter, listen to me!"

Brother Chuan Xiao was stunned for a moment, and asked curiously: "Have you been looking at Boss Huang's restaurant recently?"

"How do you know?" Xu Mang was stunned for a moment: "Xiaoman has been watching crazy recently...I was forced to watch it with her."

"My wife did the same, which led me to watch it with me."

"..."

"..."

The same people from the end of the world, why do they know each other when they meet.

Miserable!

Regarding the black hole problem, the two solved half of it, and the rest seemed to be not a big problem, but it was already 04:30 in the afternoon, and the two cleaned up and prepared to go home for dinner.

"Xu Mang..."

"You're much happier than me." Brother Chuanxiao sighed, and complained to Xu Mang, "I can only eat egg fried rice made by my wife when I go home. It's been several years since I ate it, and she doesn't even change the pattern, but And you... it's a hot meal."

Looking at the back of Brother Chuan Xiao going away, Xu Mang had mixed feelings in his heart, brother... at least the egg fried rice is hot!

Fuda,

Teacher's apartment.

Sitting at the dining table, Xu Mang looked at the two sandwiches with only lettuce on the plate and a glass of freshly squeezed orange juice on the side. He reached out and touched the sandwiches...it was hot!

Looking up at the pile of vegetable and fruit salad in Xiaoman's bowl, I feel that this kind of life seems familiar. Is my mother back?

"Don't look at me..."

"My mother-in-law ordered this." Knowing what Xu Mang wanted to say, Yang Xiaoman said helplessly, "My mother-in-law called me a few days ago and asked me to pay attention to your diet and eat more fruits and vegetables. , Eat as little meat as possible."

words fell,

Yang Xiaoman turned on the phone and played what Xu's mother had said on WeChat.

"Xiaoman, you and Xu Mang usually eat more vegetables and fruits, and eat less takeaways. Vegetables are healthy for your health, and you must put less salt. If you use oil, try to use extra virgin olive oil. Later, Mom I'll send you two chapters on health preservation, read them carefully."

at this time,

Neither Xu Mang nor Xiaoman spoke, they sat quietly at the dining table, looking at each other.

"Want to eat hot pot?" Xu Mang suggested, "Choose spicy butter pot bottom."