The specious questions have no logic at all, and they are like nonsensical funny shows. However, both the questions and answers are so strict and serious, as if the thesis defense between the supervisor and the student is in progress.

The seemingly illogical question and answer has its own strict meaning.

The questions raised by Xu Shijie are all common sense questions for human beings, that is, there are knowledge and customs, and as long as the former has received systematic education, even ordinary people can answer all the questions; The latter is only a pure Chinese who can answer that the score is not bad.

Such a question is said to be aliens, and even earthlings from other countries may not be able to answer it. Such a question and answer can eliminate the possibility of the hidden asterisk being controlled by aliens to the greatest extent.

Obviously, the Hidden Star's answer was very satisfying, everyone's expressions had completely relaxed, and even Xu Shijie's face had a somewhat relaxed smile: "The test is complete, Hidden Star, report the details!" ”

"That's it!" The Hidden Star finished the questioning with a non-question, and immediately reported the detailed experience, "Our ship was in a state of super-light sailing when it was not lost, and it took three hours...... Twenty minutes ago, the battleship suddenly shook violently, and because the situation was unknown, our ship did not get out of the superluminal speed, and after stabilizing the state, it was found that a two-finger-wide light bar appeared on the right screen of the bridge, but it became wider and wider. Judging by the speed of the light bar, the straight-line distance from our ship is about two hundred light years,"

"Two hundred light years? Light bar? Xu Shijie couldn't help but repeat these two extremely shocking words, and suddenly shivered smartly.

It is well known that in the state of faster-than-light flight. Only continuous filaments of light can be seen on the side screen of the battleship.

This phenomenon occurs because the battleship flies faster than light, cutting through the starlight of distant stars in its path.

To explain the reasons for the emergence of this phenomenon, it is necessary to first talk about the optical system of the battleship.

The ship's optical observation system is located in all directions, and the received images are displayed in a spherical panoramic screen on the bridge. When the all-round view is turned on, the front, back, left, right, and bottom will be visible in all six directions.

In addition, due to tactical needs, the optical system of the battleship is very advanced, and the optical indicators such as the sensitivity of the front side are equivalent to the most advanced space astronomical telescopes. The side ones are only slightly worse. Ensure that the battleship will be able to detect nearby enemy ships in time in the darkest interstellar space.

Looking back at the phenomenon of light filament, for ordinary people, the optical scene formed at the speed of light can probably only be seen fresh and lively, but for insiders. The silky light on the screen contains a lot of important "information" that ordinary people are not aware of.

The light of any star radiates together in all directions in all directions. Because the distance is just too far. No matter how fast or slow the battleship is in a non-superluminal state, even if it reaches the speed of light of 300,000 kilometers per second, the distant starlight seems to be fixed.

But there is a very common phenomenon in everyday life. That is, when moving at high speed, the near object always retreats rapidly, and when it passes by at a certain speed, you can only see a blurred outline in the form of a line.

The light filaments that appear when flying faster than light speed are also based on a similar principle - the light from the stars has long been distributed on the trajectory of the battleship that is about to fly, and in the case of low-speed flight, the starlight can be regarded as dots, but when flying at high speed, the battleship will receive all the dotted starlight scattered by a star in the astronomical scale in a very short period of time, and a large number of dotted starlight will continue to appear in one direction, which can form a continuous light filament on the screen.

Moreover, the filament is not fixed, and the length is not consistent.

In faster-than-light conditions, all the starlight in front of it will become very bright, and when the position of the star is moved to the side due to the movement of the battleship, the original dotted starlight will gradually deform and elongate, and slowly move from the edge of the front screen to the side screen.

In this process, the starlight moving to the side screen will gradually lengthen with the position of the star and the battleship, and the light filament will gradually retreat as it lengthens and recedes, until the star moves to the side of the battleship, and the length of the light filament reaches its maximum, and finally disappears completely before entering the range of the rear screen.

In general, the faster the speed of the aircraft, the longer the filaments form on the screen. However, there is still a distance between the length of the filament and the important factors of the screen retention time.

The closer the star is to the battleship's flight, the longer and more obvious the light filament formed, and the shorter the screen retention time, the light filament formed by the distant starlight is relatively shorter, but the speed of movement to the back screen is also slower, and the screen retention time is relatively long, and the blurred imprints left by some distant deep-sky objects on the screen will only move a few centimeters in the flight of hundreds of light years.

Experienced crew members can roughly judge the approximate distance between the star forming the filament and the battleship by looking at the speed of the filament. The width of the filament is equivalent to the diameter of the star seen when the battleship is stationary, and only when it is very close to the star, will a certain filament be seen to be thicker.

Whenever such a sight arises, the experienced captain will immediately order the battleship to turn.

The obvious change in the width of the filament indicates that the distance between the two sides is very close, so close that the battleship may break into the celestial system of this star, so it must change direction or deviate from the speed of light in time to avoid entering the dense airspace of the celestial body and colliding with the celestial body.

What is the concept of a two-finger-wide strip of light? This means that if the size of this star is the size of the Sun, the straight-line distance between the battleship and the star will never exceed two astronomical units!

A star 200 light-years away can form a two-finger-wide bar of light on the screen of a battleship, how big must this star be?

Xu Shijie's face turned pale, and he jumped up and yelled: "In which direction is the light bar?" ”

"Behind the side of my ship." The hidden asterisk replied.

"How did the communication come about?" Xu Shijie asked again.

"After discovering the anomaly, our ship stopped flying faster than the speed of light, and found that the concentration of particles outside the ship exceeded that of the nebula, and the electromagnetic environment was extremely unstable, so it is speculated that the loss of contact is related to the two. In order to leave the range of the particle flow, our ship carried out a multi-directional change of direction flight, and finally flew backwards for one light year, leaving the range of the particle flow. ”

No matter how fast the particle flow is, it is impossible to fly faster than the speed of light. Crystal transportation is an extremely heavy task, and it is necessary to maintain uninterrupted communication with the headquarters throughout the whole process, and in the event of an abnormal situation, we must do our best to restore communication as soon as possible.

Now that the reason for the loss of contact has been guessed, even if the Hidden Star flies upside down, it must first restore communication.

Xu Shijie's heart pounded and pounded when he heard this, and he asked in a dry voice: "From your current position, what is the direction of the light bar?" ”

"Yes...... Betelgeuse Four ......" (to be continued......)