Qin Yi touched his chin and kept rummaging through the technology tower in his mind.
"The radar technology that is more suitable for your earth now should be quantum radar technology."
In the science and technology tower, the old man made a casual move, and a book fell into Qin Yi's hands.
"Quantum radar technology?"
Qin Yi was stunned for a moment, then picked up the book and started to open it.
Anyone who has attended elementary school should know that the origin of radar is related to an animal called a bat. Bats can fly freely in the dark night, dexterously avoid any obstacles, and can also hunt in the dark.
We all know that this is because bats rely on the ultrasonic waves emitted from their mouths. Ultrasonic waves propagate in the air and bounce back when they encounter objects and are heard by the bat's ears.
Humans studied the characteristics of bats and learned to use ultrasonic waves to create radars for detecting objects flying in the air.
Of course, this is just the most primitive radar. Nowadays, radars in various countries around the world use radio wave technology, which is a technology that emits a large number of radio waves to a specific area and then uses Doppler frequency shift to detect targets.
The so-called Doppler frequency shift is very common in real life, but often you may not notice it. For example, the person behind the car hears less sound than the driver because the car is moving, because the car is approaching, so
The person in front of the car hears a higher pitch than the driver.
Using this Doppler frequency shift, scientists have created more advanced radars that use high-frequency radio waves to detect objects flying in the air.
Of course, with the development of science and technology, lidar has also appeared. Using the principle that laser light will be reflected when it encounters an object, it can also be used to detect objects and targets.
However, whether it is a radar made using acoustic waves, electromagnetic waves, or lasers, it has its own limitations.
Whether it is sound waves, electromagnetic waves, or lasers, they are easily absorbed by some objects, and are also greatly affected by weather.
Especially for sound waves and lasers, once they encounter heavy rain, heavy fog, heavy snow, etc., the sound waves and lasers will basically be completely absorbed, and they will not be able to receive them back when they are emitted, which will naturally lead to blindness.
The so-called stealth fighters studied by various countries around the world are aircraft that use various technologies to weaken characteristic information such as radar reflection waves and infrared radiation, making it difficult for enemy detection systems to detect them.
At present, the methods of aircraft stealth mainly include the following three aspects: First, reduce the radar reflection surface of the aircraft. From a technical point of view, the main measures include designing a reasonable aircraft appearance, using absorbing materials, active cancellation, and passive cancellation.
eliminate etc;
The second is to reduce infrared radiation, mainly by taking measures such as heat insulation and cooling on parts of the aircraft that are prone to infrared radiation; the third is to use concealed colors to reduce visibility to the naked eye.
The American F22 stealth fighter has almost achieved the ultimate in this aspect. The aircraft's own radar reflection surface is extremely small, and the aircraft's display has a special coating that can absorb electromagnetic waves and sound waves, coupled with excellent design.
This F22 stealth fighter is almost uninhabited around the world, and there are very few ways to detect it. It has become a representative work of stealth fighters in the world.
Qin Yi naturally knows something about radar technology and the principles of each radar technology, but this is the first time he has heard of quantum radar technology.
"Old man, I know this quantum communication technology, but how does this quantum radar work?"
Qin Yi was reading and communicating with the old man in his mind.
"The so-called quantum radar is a radar technology that uses quantum particles to image and detect targets. When the quantum particles encounter the target, their quantum properties will be changed."
"In layman's terms, this actually uses the principle of quantum entanglement. Because of the characteristics of quantum itself, quantum radar has powerful advantages that traditional radar does not have."
"It is very suitable for use on anti-gravity aircraft and can detect targets accurately and quickly, thereby protecting the safety of anti-gravity aircraft."
When it comes to technology, the old man instantly transformed into a teacher and began to explain the principles of quantum radar technology to Qin Yi in detail.
"If quantum radar can be developed, the so-called F22, Phantom and other fighters currently on your planet will definitely be able to escape."
"Because it uses quantum characteristics, no technology can interfere with or absorb its detection. All stealth technologies will expose it."
When he said this, the old man seemed very confident.
"Quantum entanglement~"
Qin Yi pondered slightly after listening. Quantum technology is considered one of the most cutting-edge technologies on earth. Among them, quantum communication technology is a new generation of communication technology that countries around the world are working hard to research.
"Isn't this just right for us to study quantum communication technology together?"
Qin Yi smiled and said.
"Quantum communication technology is a technology that must be mastered. Now the electromagnetic wave communication technology on your earth is certainly sufficient on the earth."
"But once you enter the interstellar universe, regardless of the distance, within the solar system alone, the speed at which electromagnetic waves propagate at the speed of light is too slow for the entire solar system. It takes almost 8 minutes to travel 1 astronomical unit at the speed of light.
, there is a delay of more than ten minutes in one round-trip communication.”
"What's more, once you enter the vast and boundless universe, there are always so many light-year distances. Do you still want to rely on electromagnetic waves for communication at that time?"
The old man nodded and said matter-of-factly.
"Using the characteristics of quantum entangled states, quantum communication technology is completely real-time communication. In theory, no matter how far the distance is, quantum communication is real-time communication without any delay."
"In addition, the characteristics of quantum entanglement and the confidentiality of quantum communication are extremely high. Once the quantum entanglement characteristics are destroyed, they will change immediately. There is no need to worry about security issues at all."
Speaking of quantum technology, the old man began to talk eloquently again, talking about the advantages of quantum communication technology.
"Of course I know the importance of quantum technology. This quantum technology can also be used to create quantum computers."
Qin Yi nodded. Quantum mechanics is something that even a scientific person knows. Naturally, he has heard about the respective cutting-edge technologies of quantum technology many times.
Taking quantum communication as an example, there are reports from time to time that a certain institution or country has developed quantum communication technology, or developed a powerful quantum computer to attract attention.
"If you know, then quickly learn this book together."
The old man touched his beard and smiled like a coward. Then with a casual move, another book appeared in Qin Yi's hand.
Qin Yi looked at the cover of the book, Detailed Explanation of Quantum Theory.
"Quantum technology is now fully understood. Once quantum technology is fully understood, quantum computers, quantum communications, quantum radar, etc. will not be a problem."
"This quantum technology can be said to be the most important technology for primary civilizations. It plays a very important role and is of great help to the exploration of the interstellar universe, navigation, etc."
"First understand the theory thoroughly. When your Galaxy Technology Research Institute is built next year and you have various research equipment, you can research these technologies."
ps: The new book is pink and tender. Please collect it, click it, and recommend it~