I! Conan forensic doctor, god-level academic master

"Everyone may know about lasers, but you don't know that there are many classifications of lasers."

"The representative ones are carbon dioxide lasers, YAG lasers and glass lasers."

Gao Chengyuan took a sip of water and moistened his throat.

"If the intensity of the laser can be so strong that it can burn a person, maybe the scene will be like a shot from a science fiction movie."

"In modern times, this kind of high-lethal laser is not impossible to manufacture!"

"At the same time, many large factories have this kind of laser, which is mainly used for cutting and welding steel plates."

"In order to be able to produce a laser with a high output power, it is necessary to output the laser beam, including carbon acid, at a high speed, and to ensure that the high-voltage discharge can proceed smoothly, so the scale of the device required is naturally large.

A tractor-sized laser device can cut through a steel plate that is only a few millimeters thick. "

"In the movie, James Bond used a pistol-sized laser gun to cut the body of an armored car."

"That's very difficult to achieve, which is why I can't find a large laser device in the owner's house. "

"That-" Kudo Shinichi asked, "What kind of laser device is he using?" "

"Nothing mysterious, 'nitrogen-neon' laser!"

Gao Chengyuan said to the shopkeeper Maejima: "I don't know if what I said is right?" "

The shopkeeper, Maejima, lowered his head and turned pale.

Officer Twilight asked, "What is a nitrogen-neon laser?" "

"You should be familiar with this kind of laser, this is a laser that singers often use in concerts, and its principle is the same."

"Didn't you say that lasers travel in a straight line?"

Officer Twilight asked, "I remember walking about 200 meters from the T-shaped intersection where the accident occurred, and there was a turning point from here to the scene of the crime!" "

"So use mirrors.

If a laser is fired directly from this location, it may hit a telephone pole or other object around the first corner. "

Gao Chengyuan took the lens and explained: If a special mirror with gold plated surface is placed there to adjust the position, the laser can be shot at the T-shaped intersection, because gold can reflect the laser almost 100%.

Kudo Shinichi suddenly asked, "You need to use a nitrogen-neon laser when adjusting, right?" "

"Not bad!"

Kudo Shinichi asked, "Then why do you sometimes see it and sometimes you can't see it?" "

Gao replied: "Generally speaking, lasers cannot be seen with the naked eye, but once they come into contact with something, we can see its reflected light. "

"For example, a nitrogen-neon laser will show a red line when it encounters dust flying.

When Xue Sui saw the red line, it was probably when dust or other substances were flying. "

Gao Chengyuan went on to answer all their questions.

No matter how difficult the problem is, no matter how difficult it is, it seems that there is no pressure on him.

"One last question."

Officer Twilight cleared his throat, "Since the shopkeeper Maejima used lasers to kill people, he should have left the laser generation device behind." "

"Why can't we find it here?"

“binggou!"

Gao Chengyuan snapped his fingers, "The question is good, from this question, you don't understand the popular science I gave you at all." "

"That device should be in the opposite room!"

Kudo Shinichi's IQ is far beyond ordinary people, and as soon as he heard Gao Chengyuan explain the whole principle, he immediately figured it out.

He pointed to the second floor across the store, "Where it should be, if I'm not mistaken." "

"Senior Gao Cheng found the reflective glass from the room of the shopkeeper in front of the island, and it is clear that he did not transform his room into a launch site, but chose the opposite room."

"Am I right?"

Gao Chengyuan looked at Kudo Shinichi and showed a smile: "You're not stupid!" "

Suddenly, Kudo Shinichi's eyes widened for a moment, his fists clenched tightly, and his eyes spewed anger.

This is the first time he has been told to his face that he is not stupid!

Who dared to say that to him before?

But even if he was told that he didn't fold, because this is a fact in itself, and Gao Cheng was his peer.

Shinichi Kudo swears that he will definitely win him in reasoning!

Gao Chengyuan didn't take Kudo Shinichi to heart at all, and said slowly:

"According to the mathematical principles and formulas of refraction and reflection that elementary school students know, it is not difficult to come up.

In order to reduce suspicion, the owner Maejima has adjusted the emission route of the carbon dioxide laser, and may have tried to emit a nitrogen-neon laser beforehand.

In the room across from the convenience store, I think the former island owner has not had time to transfer the carbonic acid, hydrogen, and nitrogen gas storage cylinders and carbon dioxide laser devices necessary to generate the laser beam. "

After speaking, Gao Chengyuan got up from his seat and drank the water that dried Xue Sui in one gulp.

Then, Gao Chengyuan pulled Xue Sui out of the convenience store.

"Gao Chengjun."

Officer Twilight suddenly stopped Gao Chengyuan.

Gao Chengyuan didn't look back, and said softly:

"All the literacy has been swept for you, and all the reasoning and explanations have been told to you!"

"The food has been fed to your mouth, do you want me to let you open your mouth?"

Kudo Shinichi: "Don't you want to hear his motive for committing the crime?" "

"I'm not you, don't want to!"

Gao Chengyuan pulled Xue Sui away without a trace of nostalgia.

But he was grabbed by the arm and could not walk.

In the face of Concubine Yingli's obstruction, Gao Cheng had no choice at all.

"If you finish eating, you can't leave anything left." Fei Yingli glanced at him: "Then you don't listen to the motive for committing the crime after reasoning like you." "

"But... Let's go! "

Gao Chengyuan was helpless, not because he didn't want to listen.

It's that behind the motive there is often one regret after another.