Top Student

"Professor Xu, what method did you use to survey the seabed?"

Soon, Tang Zhen noticed that in Xu You's computer, not only the data of the depth of various sea areas appeared, but also some three-dimensional models.

These models are just three-dimensional maps of the geological structure of the seabed.

You know, it is absolutely impossible to achieve such a result only by relying on the ultrasonic positioning system.

"Professor Tang, I use electromagnetic waves." Xu You replied lightly.

"Electromagnetic waves? How is this possible!"

When Tang Zhen heard the words, he quickly expressed his disbelief.

Not to mention a professor who specializes in exploration, even a middle school student would probably know that the energy dissipation of electromagnetic waves in water is extremely fast.

In seawater, because of the high salt content, electromagnetic waves are not suitable for propagation in it.

Xu You's reaction to Tang Zhen was also completely in the process of medical treatment.

"Professor Tang, most electromagnetic waves are naturally not suitable for propagating in seawater. But in fact, there are some electromagnetic waves that are not so severely attenuated under seawater."

Hearing what Xu You said, Tang Zhen reacted immediately.

"I know, it must be an extremely long wave! Theoretically, the longer the wavelength of an electromagnetic wave, the less attenuation in water. Like many submarines, they use extremely long waves to transmit underwater messages!"

After the excitement, Tang Zhen suddenly remembered something.

"However, Professor Xu, the extremely long-wave launch equipment should occupy a large area, right? Even a submarine cannot carry such a large launch equipment, so the extremely long-wave launch equipment can only be built on land. You just now The equipment used should not be able to emit extremely long waves."

Tang Zhen is indeed a very professional industry expert, and soon discovered the problem.

Since the transmitting equipment of ultra-long wave and extremely long wave is very large, it needs to cover an area of ​​several square kilometers.

Naturally, such a huge device cannot be installed in a submarine.

In this way, only the land and the submarine can complete one-way information transmission.

"That's right, Professor Tang. I have also considered the idea of ​​using extremely long waves for sea surveys, but I rejected it because the launch equipment is too large. In fact, the type of electromagnetic waves I use is a special kind. laser."

"Laser?" Tang Zhen asked in surprise.

"Yes, lasers. One of the biggest characteristics of lasers is that their energy is particularly concentrated. Through experiments, I have indeed discovered that some lasers can travel a long distance in the sea."

While talking, Xu You displayed various relevant theoretical formulas on the computer, explaining the theoretical basis to Tang Zhen.

"It's really a perfect and novel theory!"

After listening to Xu You's detailed explanation, Tang Zhen couldn't help feeling emotional.

Theoretically, lasers of these specific frequency bands can indeed travel over 100 meters on the seabed.

"Well, according to these theories, blue and green lasers can travel hundreds of meters or even kilometers in seawater. Of course, this is only a theoretical limit. In reality, due to various factors , the transmission effect will definitely not be so ideal, but there is no problem for two or three hundred meters."

At this time, some doubts suddenly appeared in Tang Zhen's heart.

"Professor Xu, when did you make these experimental results?"

Only a few days have passed since the last meeting of the project team.

It was really hard for Tang Zhen to imagine that in just a few days, Xu You was able to complete a series of huge tasks from conceptualizing the project, to conducting multiple experiments, screening out specific electromagnetic wave frequency bands, and making experimental equipment.

Xu You also felt Tang Zhen's doubts from Tang Zhen's tone.

"It's like this, Professor Tang. Although my main research direction is condensed matter physics, in fact, when I first came into contact with scientific research, I studied quantum optics in quantum physics. As for light, my research is not enough. Little, so these experiments, I have already completed before coming."

"I see. No wonder everyone said that you are a cross-disciplinary talent, Professor Xu, and specially asked you to be a special consultant in the project team. Sure enough, there is no problem, and it is difficult to beat Professor Xu."

In less than an hour, Xu You completely conquered Tang Zhen.

"Don't worry, Professor Tang, we haven't compared the data measured by the new equipment with the actual data. Moreover, the equipment this time is only a test product, and it will definitely need further optimization in the future."

After processing the data, Xu You and Tang Zhen compared the data together.

This comparison was good, and Tang Zhen was so surprised that he praised it again and again.

"Professor Xu, the data measured by this experimental equipment is too accurate! Compared with the previous positioning system, the accuracy is several times higher!"

"Well, when designing, I added a secondary positioning system to further improve the accuracy of the measurement. Of course, in addition to this, electromagnetic waves can also transmit more information than sound waves. For example, We can also detect the specific composition of the seabed geology through this device."

As he said that, Xu You operated the software in the computer and opened another interface in the software.

Immediately, according to the reflected electromagnetic waves obtained by the equipment, a simulated 3D seabed structure map was presented on the screen.

"This...how did this happen?"

Seeing Tang Zhen's surprised look, Xu You smiled and said:

"When electromagnetic waves touch different material structures, the reflected electromagnetic waves will show different changes in data in various dimensions. As long as the characteristics of these data can be accurately analyzed, theoretically, it is possible to get a structural map of the seabed."

"Theoretically, this possibility does exist, but I still find it incredible. Just based on some data, can such detailed information be obtained?"

But after comparing the data, Tang Zhen could only believe in this fact.

Through the data received by the detector developed by Xu You, the geological structure map of the seabed obtained is indeed very close to the field survey.

In the face of the solid facts, Tang Zhen no longer had any doubts.

"Professor Tang, in fact, as long as you know how the electromagnetic waves reflected back by these lasers are different when they encounter different substances, then it is not so incomprehensible to conduct sea surveys through electromagnetic waves. Of course, only by reflecting back The data is still not enough, and the processing of the data is also very important. So far, the entire detection system is not so ideal, and I still need to make some optimizations in the future.”

"Professor Xu, isn't this ideal?" Tang Zhen asked in surprise.