I! Conan’s forensic doctor, god-level scholar

“Everyone may know about lasers, but you don’t know that lasers also have many classifications.”

“Typical are carbon dioxide lasers, YAG lasers and glass lasers.”

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

“If the laser is strong enough to burn a person, maybe the scene is like a shot in a science fiction movie.”

“In modern times, this high-lethal laser is not impossible to make artificially!”

“At the same time, many large factories have this laser, mainly for cutting and fusing steel plates.”

“In order to be able to manufacture a laser with a large output power, the laser beam, including carbonic acid, must be output at a high speed, and it must be ensured that the high-voltage discharge can be carried out smoothly, so the scale of the required device is naturally large.”

A laser device the size of a tractor can cut a steel plate that is only a few millimeters thick. ”

“In the movie, James Bond used a laser gun the size of a pistol to cut the body of an armored car.”

Gao Chengyuan said: “That is difficult to achieve, which is why it is impossible to find a large laser device in the owner’s house.” ”

“So—” Kudo Shinichi asked, “What laser device did he use?” ”

“Nothing mysterious, ‘nitrogen-neon’ laser!”

Gao Chengyuan said to the shopkeeper Maeshima: “I don’t know if what I said is right?” ”

The owner Maeshima lowered his head and turned gray.

Officer Twilight asked, “What is the ‘nitrogen-neon’ laser?” ”

“This kind of laser, you should be familiar with it, this is a laser that singers often use in concerts, and its principle is the same.”

“Doesn’t it mean that lasers travel in straight lines?”

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 place of the crime!” ”

“So use mirrors.

If the laser is shot directly from this location, it may hit the telephone pole or other object at the first corner. ”

Gao Chengyuan took the lens and explained: If a special mirror with a gold plating 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 a nitrogen-neon laser when adjusting, right?” ”

“Good!”

Kudo Shinichi asked, “Then why is it sometimes visible and sometimes invisible?” ”

Gao Chengyuan replied: “Generally speaking, a laser cannot be seen with the naked eye, but once it hits something, we can see its reflected light.” ”

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

When the snow spike sees the red line, it is likely that there is dust or other substances flying. ”

Gao Chengyuan went on to answer all their questions one by one.

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 Maeshima used lasers to kill people, then he should have left the laser generation device.” ”

“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 listened to Gao Chengyuan’s explanation of the whole principle, he immediately pondered it thoroughly.

He pointed to the second floor opposite the shop: “Where it should be, I didn’t guess wrong.” ”

“Senior Gao Cheng found the reflective glass from the owner’s room in Maeshima, 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 hint of a smile: “You are not stupid!” ”

Suddenly, Kudo Shinichi’s eyes widened in an instant, his fists clenched tightly, and his eyes erupted with anger.

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

Who dared to say that to him before?

But even if he was told that he did not fold, because this in itself was a fact, and Gao Cheng was originally his peer.

Kudo Shinichi swore that he would definitely beat 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 refractive reflection that elementary school students know, it is not difficult to come up.

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

In the room opposite the convenience store, I think the former owner of the island store has not yet had time to transfer the carbonic acid, hydrogen, and nitrogen storage cylinders and carbon dioxide laser devices necessary to generate laser beams. ”

After that, Gao Chengyuan got up from his seat and drank the water from the dried snow spike.

Then, Gao Chengyuan pulled Xuesui out of the convenience store.

“Gao Chengjun.”

Officer Twilight suddenly stopped Gao Chengyuan.

Gao Chengyuan did not look back and said softly

“All literacy has been swept away for you, and all the reasoning 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 about his motives?” ”

“I’m not you, don’t want to!”

Gao Chengyuan pulled Xuesui away without a trace of nostalgia.

But he was grabbed by the arm and couldn’t leave.

In the face of Concubine Yingli’s obstruction, Gao Chengyuan was helpless at all.

“If you finish eating, you can’t have leftovers.” Concubine Yingli gave him a blank look: “Then there is a motive for you who doesn’t listen to the crime after reasoning.” ”

“But……. Okay! ”

Gao Chengyuan was helpless, not because he didn’t want to hear it.

Rather, there are often regrets lurking behind the motive.