Chapter 901

Xue Qian did not stop explaining: "in fact, you should all find that there will be a corner between each cell in the dungeon, which is also designed for silencing."

Wu Chen was as like as two peas in this theory. But the statement of Xue Qian is exactly the same. Every cell will have a corner and new cell.

"As I said, the purpose of silencing is to prevent someone from breaking the prison, but it's a double-edged sword. If it can be silenced to outsiders, the people guarding the cell will also be silenced. If the robber comes in from the outside and can't quickly communicate to the guards inside because of the noise reduction, he is likely to be taken down at one stroke. And what I'm going to say now is that they won't be silenced. That's straight line! "

In Wu Chen's opinion, such an explanation is dispensable. Wu Chen doesn't know what happened to the prodigal son Hao. It can be imagined that their current situation is by no means too good. And it's very likely that prodigal son Hao has been caught by the mysterious man. If so, how can Wu Chen listen to Xue Qian's explanation.

Xue Qian seemed to see Wu Chen's impatience, so she had to say: "I don't know how to find the prodigal son Hao now. I want you to think about something together when I say it to you. When my father says it to me, it's actually a way of riddle."

It's this sentence that forces Wu Chen to listen patiently. He must say it to Xue Qian. His father wants her to come up with the answer by herself.

So Xue Qian continued: "in fact, the transmission of sound can be transmitted by straight line or curve, but my father said that the transmission of sound in the dungeon is by straight line. Once there is something wrong with the guard at the entrance, the guard inside has a way to know, and this way is straight line. Now I have said the riddle, but you have to think about the answer. I haven't figured out the principle for more than ten years, but what my father said won't lie to me. "

If we just think about this puzzle, it won't take much time for Wu Chen to come up with it. But now it's an emergency. He has no way to calm down and think. How can straight lines and curves spread sound faster?

Just now, the voice of prodigal son Hao came directly. According to Xue Qian, they were in the same line with prodigal son Hao just now. But even if it's a straight line, except the way in, there are three directions that can form a straight line with the place where prodigal son Hao is.

And the most bizarre thing is that there are dozens of cells between these three so-called straight lines, one corner after another, but there is more than one branch road. How can we find the so-called real road?

Unless we can solve the puzzle left by Xueqian's father, it will be very difficult to find the prodigal son Hao.

But in addition to Wu Chen, Pingyue and Xueqian have been thinking about this problem very seriously. Straight lines can spread sound better. What's the principle.

As we all know, the speed of sound propagation in the air is equivalent, so why does it travel faster in a straight line?

Pingyue thinks about Xueqian's words, and suddenly casually asks: "if someone comes to break the prison, then they must be important prisoners. They will be locked in the deep. Only they can inform the innermost guard, right?"

Xue Qian nodded and said: "my father said that at that time, even if there were small forces to break the prison, they would be beaten back by the outermost guards, because the guards of this dungeon are all experts. In order to prevent the powerful people from breaking the prison, we came up with this method to design it, so naturally, the notice is also the innermost guard. "

"I seem to understand something!" Pingyue looked around the dungeon thoughtfully. Wu Chen couldn't bear it and asked, "what do you understand?"

Pingyue doesn't pay attention to Wu Chen at all. Xueqian immediately stops Wu Chen's restless heart. Xueqian says, "give her some time. Maybe you can find the prodigal son Hao. If you interrupt her now, it will only delay time."

When Wu Chen heard this, he immediately stopped and anxiously waited for Pingyue. After half a day, Pingyue began to smile and said, "come with me!"

Seeing Pingyue's confident expression, Wu Chen was a little strange. He asked, "do you know the secret of this dungeon?"

"Well!" Pingyue laughed a little, and then said: "in fact, it's really good to use the method of silencing to design the dungeon, but it also needs certain means. Xue Qian said that the dungeon informs the guards with a straight line. Normally speaking, it's very difficult to transmit sound in such an anechoic space, so how to transmit sound with a straight line? "

Wu Chen looked at the smile on Pingyue's face, and a sense of being bullied immediately came over. Without a word, he heard Pingyue continue to say: "sound is transmitted through media, including air, liquid and solid. Among them, solid is the fastest and the only way for deaf and dumb people to hear sound. I have just observed that there is no water in the dungeon, and because the air is silenced, only solid is left. "

After a pause, Pingyue said, "we just heard the roar of prodigal son Hao, because it came from a straight line, but are you sure where he is now?"

Wu Chen shakes his head, but Xue Qian's eyes are on all sides. At the same time, Ping Yue says: "people who build dungeons want to design dungeons by silencing, but people with profound skills can also make sounds in silencing, so they should design reverberating dungeons. That's why we can hear the voice of prodigal son Hao just now."

"But there's not much sound between the cells?" Snow Qian hesitated to ask a sentence.

"Yes Pingyue immediately said, "that's the so-called silencing. It's just the silencing between the cells. It's also designed for the intruder to ask the prisoner and the deepest prisoner. However, in order to achieve a straight-line effect, only the mode of communication is designed to reverberate. Just now we heard the voice of prodigal son Hao, but we can't determine where prodigal son Hao is. Do you understand why this is? "

Xue Qian nodded secretly, then put her eyes on the brick wall of the cell and explained: "this is to pass the message to the guards inside. In fact, silencing is just a trick. The straight line is not to deliver messages, but to make the design of the labyrinth meaningful. The real answer lies in these brick walls. The thicker the brick walls are, the deeper the cell is! "