I really don't want to lie down and win

"As long as a certain value is given, the universe can be kept static and no longer change." Xu Mang continued, "Unfortunately, even if this cosmological constant is added, the calculated universe is still dynamic."

"Later..."

"Ed Hubble discovered that the universe is expanding, how he discovered it, and how he proved it, Mr. Xu will not explain too much here." Xu Mang smiled: "Then Einstein felt that he had committed the biggest mistake in his life. Wrong, adding an unnecessary cosmological constant."

This...

The professor standing under the podium was a little surprised when he heard Xu Mang's science popularization.

Originally, I thought Xu Mang was just briefly introducing the cosmological constant, but who knew that this guy would describe the past life of the cosmological constant in such a concise and easy-to-understand manner, what a talent!

under...

It should be the point!

I hope Xu Mang can bring some surprises!

The professor knows that the previous introduction is not important, but the latter content is important.

"However, one of Einstein's mistakes unintentionally brought an unsolved mystery to the world." Xu Mang said seriously: "The cosmological constant is endowed with a physical equivalent to vacuum energy, which exists in the background of space. energy, dark energy."

after that,

Xu Mang was out of control.

From the speculation of dark matter to overthrowing the theory of big collapse, from the problem of the cosmological constant to the theory of quantum gravity, from the assumption that the vacuum has force properties to the theory of inflation.

Xu Mang went farther and farther on the road of pretending,

Never looking back.

And the scene gradually began to get out of control.

"..."

"..."

"..."

Is it over?

Is it over?

You can't stand on it, can't you?

The students were going crazy. Apart from marveling at Xu Mang's profound knowledge, they felt that this was a large-scale pretense scene, and he became the innocent background behind Xu Mang's pretense.

A simple cosmological constant actually involves so many things, and even some theories are unheard of, such as the extremely nonsense theory of the Great Rip in the Universe, what happens after 900 billion, what a joke!

at this time,

Xu Mang was talking about the quantum field theory of curved space-time. This concept is used to prove the thermal radiation of black holes proposed by Professor Hawking, that is, Hawking radiation.

But the students turned their attention to the professor, hoping that he could stop this large-scale pretense scene.

pity...

The professor was very interested in Xu Mang's opinion, and he was fascinated by it.

a full hour and a half,

It wasn't until Xu Mang talked dry on stage that he realized that get out of class was over.

"Cough cough!"

"Professor...I'm hoarse." Xu Mang looked at the professor next to him, and said helplessly, "Can you finish class?"

"get out of class off!"

suddenly,

All the students fled the scene one after another, for fear of being caught by Xu Mang too late.

Just when Xu Mang was about to go to the sophomore classroom of optics with his physics book, he was caught by the professor.

"Xu Mang?"

"When did you learn astrophysics secretly?" The professor asked curiously, "It seems to be very good."

"When dreaming." Xu Mang said with a smile.

"..."

"Don't make trouble in front of me, or you will have to retake my compulsory course, you know?" the professor said helplessly with a dark face.

I go!

This is really the same as teachers all over the world, isn't this my way of threatening students majoring in optics?

"Then what..."

"Professor, what's your surname?" Xu Mang asked curiously.

"..."

"It's November!" The professor looked at Xu Mang and said seriously, "Two months have passed, and you still can't remember my name?"

"Uh..."

"It's really raining and I have nothing to do." Xu Mang said, "I didn't take many classes in two months. Either I was caught as a coolie by this one, or I was caught as a laborer by that one."

Hearing Xu Mang's complaint, the professor smiled and said silently, "I'm very interested in your light pressure conjecture. You said that light pressure may cause accelerated expansion of our four-dimensional universe. What's your point of view?"

"I'm talking nonsense..."

"Student fooling you." Xu Mang didn't know why the system guessed the light pressure, and then said: "It may be because when the gravity of a star is less than the light pressure, the star will expand, and when the gravity is equal to the light pressure, the star will be at Stable state, from this point of view, it can be deduced that light pressure is related to dark matter."

Oh?

interesting!

This is a very bold guess.

When the professor was about to speak, Xu Mang hurriedly said, "Professor, I'm going to give a lecture...it's too late!"

words fell,

Xu Mang ran away.