To be honest, this is indeed a question that Lin Zixuan is more interested in.

In later generations, he liked to watch science fiction movies, including many movies about time travel. Especially the very famous "Interstellar", but he just watched the fun and did not understand the profound scientific theories.

Many scientists in later generations believed that time travel was theoretically feasible.

For this reason, some people proposed the idea of ​​four-dimensional space, adding time to the dimension, and believed that the natural "transportation" of time and space travel is a black hole.

These conjectures about time and space travel originate from Einstein's theory of relativity.

In Newton's view, the long river of time is straight, continuous and consistent. It never deviates and always passes at the same speed, leading all things in the world in its own way.

Later, Einstein believed that time "is not so stable, and the long river of time winds and turns will accelerate or decelerate around stars and galaxies."

In 1949, Einstein's colleague in Princeton, logician Kurt Godel found a solution to Einstein's general relativity equation, which describes the universe as rotating.

If the universe is really spinning, then when you sail around the space by a rocket, you will return before you set out.

This discovery confused Einstein.

In Einstein's memoir, he admitted that this is indeed the solution to his equations, but he also believed that we could physically abandon them because the universe is expanding and does not turn.

In 1963, mathematician Roykell discovered that a rotating black hole would collapse into a ring of compressed matter, rather than a point.

If you pass through the middle of this ring, you may experience a time rewind, or even travel to another universe.

Mathematicians call this space "multi-connected space" and physicists call it wormholes.

By the late 1980s, Caltech physicist Kipthorne and colleagues discovered another set of solutions to Einstein's equations, which showed that wormholes could be traversed.

In the 1990s, Edward Witton proposed an m theory with 11 degrees of space.

He and other scholars found strong evidence that many different versions of superstring theory at that time were actually the result of different limit setting conditions of m theory. These findings led to the second innovation of superstring theory.

String theory mainly tries to solve the two major physics theories that are surface incompatible with quantum mechanics and general relativity, thereby solving the problem of black holes.

However, all of this research is theoretical assumptions and conjectures and cannot be verified.

Lin Zixuan wanted to take this opportunity to ask Einstein in person whether time travel is feasible.

The scholars here are not unfamiliar with time travel, and most of them who are exposed to Western literature know about it.

In 1895, the classic masterpiece "Time Machine" by British science fiction novelist Wells was released, throwing this issue to the whole world, causing considerable controversy.

Although "The Legend of Qin" is not very popular in this era, it also proposes the concept of "time travel".

Traveling through time and space and going back to the past has always been considered a plot in the novel and has nothing to do with science.

At this time, Lin Zixuan raised this question in front of a great scientist, which caused everyone to laugh with kindness.

Because such a problem is in line with Lin Zixuan's identity as a writer, it will also become an interesting story, adding color to this dinner.

Einstein thought about it and seemed to be really considering whether there is such a possibility.

"I think this is unlikely and cannot be verified." Einstein smiled and shook his head. "The speed of light is the fastest known in the universe at present. It does not make much sense for talking about exceeding the speed of light. It can only be a hypothesis. Of course, you can realize this dream in the novel."

This is the only exchange between Einstein and Lin Zixuan.

The two neither sparked the thoughts nor had a confrontation of wisdom. They were just ordinary conversations, which disappointed the bystanders around them.

Lin Zixuan has a self-knowledge.

His showing off his science fiction knowledge in front of ordinary people may gain admiration, but showing off in front of a top scientist is a humiliation.

At this time, Einstein was studying quantum mechanics. He confirmed that time will slow down when an object approaches the speed of light, and time may bend when an object exceeds the speed of light.

There are many possibilities for this bending, and the rewind of time is just one of the conjectures and it is difficult to explain clearly.

He didn't think that this Chinese novelist could understand such a complex physics topic, so he just said a few perfunctory sentences.

In 1935, Einstein mentioned a concept of a "space-time bridge", commonly known as a wormhole, in a paper. He believed that there may be narrow tunnels connecting two different time-spaces in the universe, allowing time travel.

After the dinner ends, Lin Zixuan returns home and he is preparing for the wedding to be held tomorrow at the Holy Trinity Church in the Public Concession.

Trinity Church in Shanghai is located in Huangpu District. It was founded by the British in 1869. It is a church serving the Anglicans among British expatriates and is also the most luxurious church in Shanghai at present.

Lin Zixuan's wedding caused a lot of sensation and published the marriage news in "Shen Bao".

At this time, there is no marriage certificate when getting married, but there is a marriage letter.

On August 19, 1914, the Beiyang government promulgated the "Regulations on the Use of Printing of Personnel Vouchers", which stipulates that each paper wedding book will be stamped with one yuan. If the stamp is not stamped or stamped, it cannot be used as a valid proof of the marriage in court.

This kind of marriage certificate with a printed ** is considered a government-certified marriage certificate.

When wealthy families get married, they must publish their marriage news in newspapers to show their solemnity and also as a testimony. Of course, news will also be published in newspapers during divorce.

Einstein stayed at the home of a Jew in Shanghai, No. 9 Dumei Road, French Concession in Shanghai.

As a Jew, at the invitation of the Shanghai Jewish Youth Association and the Academic Research Association, he gave a speech on relativity at 3 pm on January 1, 2019 at the Auditorium of the Work Department of the Public Concession, No. 17 Fuzhou Road.

In other words, when Lin Zixuan got married, Einstein was talking about the theory of relativity.

Einstein left Shanghai on the "Haruna Maru" mail ship at 11:00 on January 2, 2019 and returned to Europe.

When he was at sea, he recalled his experiences in Shanghai, habitually wrote about his travel experiences, and occasionally Lin Zixuan's figure flashed through his mind.

Einstein was not deeply impressed by Lin Zixuan. He didn't even remember Lin Zixuan's name, or he didn't remember the names of most Chinese people.

He just remembered the questions asked by Lin Zixuan, at least the questions about time travel among everyone's questions were quite interesting.

Time travel?
Chapter completed!