How the other professors arrange their class time, the smuggler man doesn't know. However, I really like Einstein's arrangement, which gives students time and can ask questions in class.

"Professor, in your discussion earlier, it was mentioned that all test objects with a sufficient mass (i.e., their own mass has a negligible effect on the gravitational field) move in the same way in the same gravitational field.

Can I assume that when a photon passes through a gravitational field, it also changes direction according to the trajectory of the geodesic?" asked a man who looked like a scholar in his thirties. I guess it's the same as us, it's also an auditor, ha!

"Your question is good! Can I know your name? Oh! I know who you are! You are better at math and astronomy than I am!" Einstein was a man of humor.

"According to Newton's theory of universal gravitation, a photon with zero mass does not have a gravitational phenomenon even when passing through a massive object such as the Sun!

The theory of general relativity holds that even a zero-mass photon will change its trajectory when it passes past the sun's gravitational field!

This is the most obvious opposition between the two systems of space-time theory! This needs to be verified scientifically! I believe that history will prove that the general theory of relativity is closer to the truth. ”

Another question from the lecture was: "Professor, according to the system of special relativity, every non-zero mass object has an independent space-time. Can we think that even if it is a button, it has the possibility of forming an independent storage space?"

Albert Einstein was a good-natured scientist! He didn't have the arrogance of a celebrity. For this whimsical and strange question, I still think carefully in order to give the most appropriate answer possible.

Einstein on the stage was still organizing his language, and in a certain button on the clothes of an auditor in the back row of the class, he suddenly became enthusiastic: "Boss, quickly manifest! Help Einstein provide factual evidence!"

"Yes, we're in the button!

"Yes, Boss, you see, Einstein can't answer! Let's answer him with facts!"

"Please, as soon as we show up, we will properly change the history of the earth!

The stowaway man won't make a supernatural phenomenon like manifesting the space of a small star, just listen!

The gravitational attraction of the gravitational source to the object is a geometric effect caused by this curvature of space-time. ”

As he spoke, Einstein wrote down on the blackboard two of the most important formulas of his theory—the Einstein field equation and the Lorenz equation.

"It is generally accepted that the difference between special and general relativity lies in whether the problem under discussion involves gravity (bending space-time), i.e., special relativity deals only with problems that have no gravitational effect or can be ignored by gravitational force, while general relativity deals with physics when gravity acts.

Perhaps, the space in the button, it exists, but we can't find it yet! Perhaps, it needs a large enough mass, such as a black hole object, to form another world that can be observed!

But there must be a definite answer to all questions!

It is estimated that Professor Einstein has not thought about how to build an independent storage space in a button.

"He's right! We're in the button, but no one else can see it!"

"Lenovo, you said, the teleportation array that enters and exits the little star, the school space, and the communication space is not a black hole!"

"Well, I didn't think about it! The mass of the black hole is so great! Our teleportation array doesn't have mass or anything. ”

"It's hard to say! Didn't the great scientist Stephen Hawking say that there are mini black holes?"

"Oh, that's it, I haven't heard the gravitational waves in detail!"

It's lively, class is over!

......

The professor left, the students left, and the stowaway man slowly left the classroom and walked on the university campus. But in the button, it is still in full swing!

"yes, we've heard Einstein lecture too!"

"What's that? We've even heard Louis XVI take the oath!" Needless to say, there are two gangs: light, virtual and real.

"Boss, why don't you get a little star for Einstein. "It's whimsical.

"What are you doing? You want to change the history of the Earth?"

"No, how dare I change history! I mean, let him have a clear research goal!"

"No! With his wisdom, he will definitely produce research results! When the time comes, the space for industrial mass production will be folded!

And then, storage belts are flying all over the sky, storage bracelets are sold everywhere, storage necklaces are worn on the head, storage rings are all over the streets!

"Hey, cause and effect, do you understand those formulas, equations or whatever?"

"I don't understand! I didn't understand it at all! I studied these things when I was in college, and I learned Bohr's theory and Bohn's theory, but I didn't understand it! This time, I still don't understand it!"

"Alas, the rules of the two worlds are different, and we are used to the rules of the flood! So, it is indeed difficult to understand the rules of the earth!"

"Boss, what are you doing now?" Brother Bright belongs to the type that can't calm down.

The smuggler who walked out of the university area was hesitating: "In my memory, the Battle of Jutland took place in 1916! Otherwise, let's see how other people's naval battles are doing?"

"Oh!

"This kind of duel between giant ships and cannons will definitely not happen again in the future!

"Yes, it has to be recorded! In the future, when you reach the sea of stars, you will be able to turn it over without incident!"

A group of elementary school dropouts who are not afraid of things immediately threw the theory of relativity out of the clouds!

Now it's time to move a small orange, take a bag of melon seeds, sit on the clouds, and laugh at the rain of other people's ships!

"Well, not now! There are too many people. We have to wait until the evening, and then we'll go over! Stop directly at the fort by the military harbor. "The war correspondents are ready to go.

In the northwest of Germany, there is a right-angled coastline with Bremen as its apex. The battleships of the German Navy were moored in Wilhelm's home port.

"Wow! So many warships! Such thick barrels! Such a big hull! Compared to the Qing Dynasty and the Beiyang, but it is much stronger!"

"It's rare, isn't it? The British are more, bigger, thicker!

A group of countrymen who had never seen the fruits of the Industrial Revolution (isn't Hanchen Island just a country?) were stunned by the many giant ships and cannons in front of them.

"Hey, I've found out!"