"Professor Xu, what method did you use to conduct seafloor survey?"

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

These models are exactly three-dimensional views of the geological structure of the seafloor.

You must know that such a result cannot be achieved simply by relying on the ultrasonic positioning system.

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

"Electromagnetic waves? How is this possible!"

When Tang Zhen heard this, he quickly expressed disbelief.

Not to mention a professor who specializes in exploration, even a middle school student will probably know that the energy of electromagnetic waves dissipates extremely quickly in water.

In sea water, because of its high salt content, electromagnetic waves are even less suitable for propagating in it.

Xu You's reaction to Tang Zhen was also entirely medical.

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

After hearing what Xu You said, Tang Zhen reacted immediately.

"I understand, it must be extremely long waves! Theoretically, the longer the wavelength of electromagnetic waves, the less attenuation in water. Like many submarines, they use extremely long waves for underwater message transmission!"

After the excitement, Tang Zhen suddenly remembered something again.

"But, Professor Xu, extremely long-wave transmitting equipment should occupy a large area, right? Even a submarine cannot carry such a large transmitting equipment, so we can only build extremely long-wave transmitting equipment on land. What did you just say?

The equipment used should not be able to emit extremely long waves."

Tang Zhen is indeed a very professional industry expert, and he quickly discovered the problem again.

Since ultra-long wave and extremely long wave transmitting equipment are very large, they require an area of ​​several square kilometers.

Such huge equipment is naturally impossible to install in a submarine.

In this way, only one-way information transmission between land and submarine can be completed.

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

laser."

"Laser?" Tang Zhen said in surprise.

"Yes, laser. One of the biggest characteristics of laser is that its energy is particularly concentrated. Through experiments, I did find that some lasers can propagate over long distances in the sea."

As he spoke, Xu You displayed various relevant theoretical formulas on the computer and explained the theoretical basis to Tang Zhen.

“It’s a really complete and novel theory!”

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

Theoretically, lasers in these specific frequency bands can indeed propagate more than 100 meters under the sea.

"Well, according to these theories, blue and green lasers can propagate hundreds of meters or even several kilometers in seawater. Of course, this is only a theoretical limit. In reality, due to various factors

, the propagation effect will definitely not be that ideal, but there is still no problem at 200 to 300 meters.”

At this time, some questions suddenly appeared in Tang Zhen's mind.

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

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

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

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

"That's right, 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 very good.

Few, so I had completed these experiments before coming here."

"I see. No wonder everyone says that you, Professor Xu, are a cross-type talent and specially asked you to be a special consultant in the project team. Sure enough, there is no problem that can defeat you, 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 yet. Moreover, this equipment is just a test product, and it will definitely need to be further optimized in the future."

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

This comparison was quite good, and Tang Zhen was so shocked that he even 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, during the design, I added a secondary positioning system to further improve the accuracy of 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 components of seabed geology through this equipment."

As he spoke, Xu You operated the software on his computer and opened another interface in the software.

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

"This... how on earth is this done?"

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

"When electromagnetic waves come into contact with different material structures, the reflected electromagnetic waves will show different changes in the data in each dimension. As long as the characteristics of these data can be accurately analyzed, in theory, the structural map of the seabed can be obtained."

"Theoretically, this is indeed possible, but I still find it incredible. Can we get such detailed information just based on some data?"

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

Through the data received by the detector developed by Xu You, the seafloor geological structure map obtained is indeed very close to the on-site marine survey.

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

"Professor Tang, in fact, as long as we understand the differences in the electromagnetic waves reflected back when these lasers encounter different materials, then conducting sea surveys through electromagnetic waves is not so difficult to understand. Of course, it is only based on the reflected waves.

Data is still not enough, data processing 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, is this not ideal enough?" Tang Zhen said in surprise.
Chapter completed!