"You mean negative refractive index metamaterials. Liu Long directly grasped the key point that Liu Sheng said.

"Yes, young master, in fact, the best way to solve this problem is to unlock the Material Expert. ”

Well, Liu Long admits that unlocking the material expert can definitely easily solve the problem of all-round stealth, but Liu Long also has his sufferings.

After a year of fighting with the spar in the space without darkness and night, he also unlocked the biomedical expert Liu Sheng, not that Liu Long did not work hard, but the later he came, the greater the density of the spar, the more difficult it was to break the spar.

At that time, I didn't know how Alan designed it, just like these spars have their own lives, no matter what experts Liu Long unlocks, as long as they are unlocked to a certain number, the difficulty of breaking the spars will increase exponentially, and every time he breaks the spars, it is like a battle, which is why it took Liu Long more than a year to unlock Liu Sheng.

"Unlocking Material Specialist doesn't happen overnight, so you have to think of something else. ”

Some people may say, did Liu Long forget that he has a subspace smelting factory, with a smelting factory, isn't there any material he wants, there are materials, in fact, although Liu Long has a subspace smelting factory, but that is also the premise that the smelting factory needs to have correct data, the smelting factory can produce finished products, just like we have mobile phones and calling cards, but there is no number directory, if you want to call the person you want to call, it is simply a fantasy.

Some people may say that since Liu Long can develop carbon alloy materials, then negative refractive index metamaterials should also be developed.

The fact is that the research and development of alloy materials, with the help of the huge computing power of artificial intelligence, is not very difficult for Liu Long, but although negative refractive index metamaterials and alloy materials are both materials, their characteristics can be said to be worlds apart.

Negative refractive index metamaterials are also like a pair of traditional Chinese medicine, so he must first create a variety of medicinal materials, and then combine, the gap can be imagined.

If alloy materials are compared to human beings, then the development of alloy materials is just a process of inheritance, but negative refractive index metamaterials need Nuwa to create people, which is qualitatively different.

"Young Master, light stealth is indeed not something that our current technology can accomplish. Liu Luo said a little frustratedly.

"One by one, what do you think. "Since the experts don't have a good way of thinking, they have to let them go out one by one.

"Master, if the aircraft is "transparent", that is, stealth, in addition to negative refractive index metamaterials, there is no good way to do it now, but after my analysis, even negative refractive index metamaterials cannot achieve 360-degree panoramic stealth. One by one, he collected materials from the Internet, and then replied after his analysis.

Liu Long knew that he was a little whimsical about all-round stealth.

"Since you can't be stealth in the air, then we will develop something that can be stealth in the water. "The reason why Liu Long made the stealth flying machine was that he was going to take action against Freemasonry and the countries under its control.

"Young Master, if you are stealthy in the water, it is very easy to do it. This time Liu Ji replied.

In the end, Liu Long had no choice but to settle for the next best thing and build a stealth small and medium-sized submarine.

There are two main aspects of the stealth of the submarine, one is the noise caused by the thruster when it is advancing, and the other is easy to detect because of the large hull.

For power, space technology has a ready-made earth magnetic field power, that is, the power system used on the flying car, the most important thing is to develop a device that can shield or absorb sonar, so that the submarine can be invisible underwater.

"One by one, is there any equipment that can avoid sonar detection. ”

"Young master, I just learned from my world that sonar is an electronic device that uses the propagation characteristics of sound waves under water to complete underwater detection and communication tasks through electroacoustic conversion and information processing. It is available in two types, active and passive, and falls under the category of acoustic positioning.

Sonar is an electronic device that uses underwater sound waves to detect, locate and communicate underwater targets, and is the most widely used and important device in underwater acoustics. Due to the very high attenuation rate of electromagnetic waves in water, it cannot be used as a source of detection signals, and the detection of man-made objects under the water surface by sound waves has become the most widely used method. ”

"What methods do today's submarines use to evade sonar detection? Liu Long asked.

"Designed with silent technology, such as putting the noisy engine on a rubber mat, etc., and low-speed sailing, or even full shutdown in the water suspension,

When designing, a reasonable shape design is adopted to reduce the turbulent sound of water flowing through the surface of the submarine, and a better propeller design is adopted to reduce the noise of empty light bubbles.

It is forbidden to move around, talk, or otherwise make noise.

Take advantage of the hydrological properties of seawater, such as the refraction of sound waves transmitted in seawater at different temperatures and salts, and use submarine seamounts or schools of fish.

Speaking of active, active is similar to the principle of radar, sonar first emits a sound wave pulse, which will be reflected back after hitting a submarine.

Today's submarines mainly add silencing tiles to reduce the intensity of the reflection of the sound wave or emit a deceptive reflection sound wave.

You can also fire a sonic bomb to cover itself with the sound of the explosion, and the submarine can use this time to quickly change places.

It can also take advantage of the hydrological properties of seawater, such as the refraction of sound waves in seawater at different temperatures and salts, and the use of submarine seamounts or schools of fish. One by one, he summarized the information on the Internet and said.

"Of course, if we use the Earth's magnetic field device as the power of the submarine, then it will not be a problem for the problems encountered by traditional submarines. One by one added.

"One by one, design a small and medium-sized submarine. ”

"Okay young master, I promise to complete the task, but it needs to be completed after the list of Freemasonry companies has been screened. ”

"Go ahead. ”

After Liu Long finished speaking, he returned to his world one by one.

"Young Master, now that the problem is solved, when can I go to the farm to conduct experiments on Xinsheng No. 1? Seeing that the problem was solved, Liu Sheng asked at this time.

"Is the ovule cultivation of Xinsheng No. 1 complete? ”

"The cultivation has been completed, and now it is completely ready for field experiments. ”

"Liu Luo, you and Liu Guan will talk on the phone for a while, and then the farm he bought will be equipped with corresponding security, and the level will be according to the special level. ”

"It's the young master. ”