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After listening to Han Feng's words, all the students were quiet and even relaxed their breathing.

Because the students are so curious about it.

There was such a big bubble out of thin air. It was as high as the Paris tower. It was colorful and full of unknown!

"Before I talk about what this thing is, I need to give you something popular." Han Feng turned on the projector, which appeared a very classic picture - Einstein's wormhole theory analysis.

"I believe you all know the concept of wormhole, right?" Han Feng pointed to the picture and said, "wormhole is also called Einstein Rosen bridge, which is also translated as wormhole. It is a possible narrow tunnel connecting two different spacetimes in the universe. In theory, wormhole is a space tunnel connecting two distant space-time. Just like the vortex can make the local water surface closer to the bottom, it can make two relatively far away local spaces very close in an instant. "

"Of course, the knowledge about wormholes is actually a very high-end knowledge. We just need to understand it a little bit."

"So, what is this bubble that appears in the southeast of Shencheng?" Looking around the audience, Han Feng said with a smile: "in fact, it's similar to the wormhole, but the specific theory can't be explained by our current basic scientific theory. At present, scientists in the world have given this thing a special name, called the bridge of foreign lands."

"Director Han," a student asked, "I know about the wormhole, but shouldn't it be a hole? Why is this a ball? "

"It's actually very simple," Han Feng once again clicks on the projector, which shows a rotating picture.

In the picture, it starts with a plane, and in the middle of the plane is a prototype hole.

And then when the plane starts to rotate, the previous hole becomes a ball.

Han Feng said with a smile: "it's a hole, but it's just an image we made for the convenience of explanation. A circular hole in a two-dimensional plane, placed in three-dimensional space, becomes a ball. "

So it is!

The students present nodded in succession.

People who have seen the science fiction movie "Star Trek" have basically heard the wormhole theory of the orb, but those who have not seen this movie can easily understand Han Feng's explanation.

At this time, the students have sorted out the knowledge they have just acquired, and at this time they found a very important point.

People in the world have given this thing a name. That is to say, in the world, this small wormhole in Shencheng, which is the exotic bridge, is not for recommendation tickets!

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