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First of all, a buzzing sound suddenly sounded from nowhere, the sound was very light at first, but it was very clear in the quiet passage, the sound became louder and louder in a blink of an eye, and the sound finally became one, and then the wall direction of the front and back of the door, left and right, suddenly shot out a very thin light, this light was extremely condensed, like a large net that suddenly appeared, covering the space in front ......of the door for more than ten meters.

"Laser!"

Su Yichen and Wan Changchun exclaimed loudly at the same time, and their faces showed extremely incredible expressions. As experts in physics, they are no strangers to lasers, and they can even be said to be extremely familiar with them, because in the physical laboratory, synthetic laser technology has been initially used, and in some more cutting-edge occasions or real years, the use of laser is still an indispensable means.

In fact, the original Chinese name of laser is "laser" or "laisai", which is the transliteration of its English name LASER, which is an abbreviation taken from the first letter of each word of the English LightAmplification by StimulatedEmissionofRadiation. It means "through guò stimulated radiation light enlargement". The full English name of the laser has fully expressed the main process of making the laser, and the principle of the laser was discovered by the famous American physicist Albert Einstein as early as 1916. In 1964, according to the advice of Qian Xuesen, a famous scientist in China, "light stimulated radiation" was renamed "laser".

In physics, lasers are known as "the fastest knife", "the most accurate ruler", and "the brightest light". Its application is extremely wide, according to the physical characteristics of laser, the main applications are laser marking, laser welding, laser cutting, optical fiber communication, laser spectrum, laser ranging, laser radar, laser weapons, laser records, laser pointers, laser correction, laser beauty, laser scanning, laser mosquito killers and so on.

Nowadays, due to the limitations of China's science and technology and industrial technology, only a small part of the practical application of these theories has been realized, and the vast majority of them are basically in the application stage of real and exploration, and even the various uses of lasers in foreign countries are constantly exploring and developing.

According to the characteristics of the laser, the photons of the laser are completely different from the ordinary light source, such as lights, etc., it is not like the ordinary light source is sporadic, but has the characteristics of strong aggregation, all the photons of the laser are gathered in a center, just like countless people twist all the strength together, which leads to the laser has invincible power.

It is precisely because the laser is extremely powerful as a weapon, it can not only cut any object in an instant, but also the laser itself has an extremely high temperature generated by large energy, if it is shot by a high-power laser, even a thick steel plate can not resist, let alone an ordinary human body? So, there is another terrible name for lasers, and that is dead light!

No one thought that the source of danger described by Lin Jia in the final record would actually be a laser, judging from this overwhelming laser, Lin Jia was also extremely careful when he tried to open the door, otherwise he would be completely covered by the laser, and Lin Jia's whole person would probably be completely evaporated in the blink of an eye. However, no matter how careful he is, he can't escape the speed of the laser launch, because from the beginning of the change in the gate to the laser launch, there is only a short interval of a few seconds, although Lin Jia reacted quickly and immediately retreated and fled, but because he was defenseless, he was still injured by the peripheral laser, which led to the final death.

Seeing the laser suddenly appear, Su Yichen and Wan Changchun were first startled and then nervous, and at this time, Hu Zhijun had already run to the bend quickly, and finally avoided the coverage of the laser at the last moment.

"Damn, what the hell is this!"

The distance from the gate to the bend is not long, and the visual inspection is only about ten meters, but this short distance of ten meters Hu Zhijun almost exerted all his strength, when he gasped and leaned against the wall, and when he looked sideways to see the dazzling light of the laser on the wall on the side of the bend, Hu Zhijun couldn't help but ask loudly.

"It's a laser." Wan Changchun replied with a blushing face.

"Lasers? What the hell is this? ”

Wan Changchun pursed his lips, and gave him a rough description of the characteristics of the laser with a stern expression, especially emphasizing the horror of laser weapons and the possible consequences of being shot, when he listened to Wan Changchun's explanation, Hu Zhijun was so shocked that his eyes were about to fall out, his face turned pale and his heart palpitated, and at the same time he was secretly glad that he had been prepared early, if he didn't run back at the first time, then the result was obvious, either he was beaten to ashes by the laser on the spot, or he died after being seriously injured like Lin Jia.

The laser coverage in front of the door did not last too long, and it was about a dozen seconds before and after. However, whether it was Su Yichen or Wan Changchun, they knew very well in their hearts that in these short ten seconds, the powerful power of the laser could not be stopped by anything, let alone escape from the coverage area.

When the lasers disappeared without warning, as they had appeared, the red light on the side of the gate gradually dimmed. After a long while, Su Yichen and the others dared to take a look, and at this time they found that the gate had returned to its original state, and the front of the door had not changed from before, as if the qiē that had just happened had never appeared.

Looking at the passage that had calmed down, the three of them couldn't help but look at each other, and everyone had a fear of escaping in their hearts.

Since coming to this place, whether it is in the "Garden of Eden" or the passages after that, and even the mysterious squares and pyramids that Su Yichen has experienced, although there is an unsolved sense of mystery everywhere, they have never encountered any danger. And now, the laser as a weapon appeared in front of them, and even almost killed Hu Zhijun.

"How can this be?" Among the three, Su Yichen was the most puzzled in his heart, although the appearance of the laser shocked him extremely much, but he was also very puzzled in his heart, it was obviously the same triangular mark, but why was he safe and sound when the pyramid was touched? Is there any difference between the two markers?

"Old Hu, what are you thinking......?"

Su Yichen's heart was pounding, and he was holding a handful of sweat in his hand, and it was not easy to calm himself down. No one expected such a danger, it seemed that the road ahead was impossible, and just as he was about to discuss with everyone what to do next, he looked up and saw Hu Zhijun looking at the door with a thoughtful expression.

"I'm thinking about a question." Hu Zhijun suddenly spoke, seeing Su Yichen and Wan Changchun looking at him with some puzzlement, he stretched out his hand and pointed at the door: "Don't you think it's strange? There was no danger on our way, including the grasslands and forests we had been to before, and even Professor Lin had searched there for half a year without encountering anything, but this was the case here...... Light....... ”

"Laser!" Su Yichen reminded softly.

Hu Zhijun nodded: "That's right, laser!" He thought for a while and continued: "Lao Wan, Xiao Su, you are experts, I don't understand scientific things, I'm just a soldier, but we soldiers have the understanding of being a soldier, the chairman once taught us that the more dangerous the place in the war, the more likely it is to be the core of the enemy, and the stronger the opponent's resistance, which means that this is also the most important area of the other side." For example, if two armies are fighting, as a battlefield commander, he will definitely set up his headquarters in the most reliable and safe place, and at the same time send heavy troops to protect it, because everyone knows that once the command is defeated by the opponent, then the result of this war is ...... loss. ”

Hearing this, Su Yichen and Wan Changchun reacted at the same time, Hu Zhijun meant that since all places are safe, only here will be such a tight guard weapon, can it also be understood in a backward way that this place is the most critical place? If this is not the case, there is no point in installing laser weapons here, as long as you find a way to open that door, the mystery may be solved, Lin Jia's initial guess should be correct, and the way out must be behind the door.

But the question is, in the face of such a powerful laser counterattack, what can the three of them do to open this door? When Su Yichen couldn't help but ask this question, Hu Zhijun suddenly smiled, stretched out his hand and asked for the gun in Su Yichen's hand, and then under Su Yichen's gaze, he suddenly turned around and raised the gun, aimed at the gate not far away and pulled the trigger without hesitation.

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Another: due to the arrangement of work, and the customer agreed, today Saturday I am going on a business trip to Zhejiang to visit, the train at half past seven in the morning, after arriving to meet with the customer and discuss business cooperation matters, and have to participate in the customer's banquet in the evening, so today can only be a change, tomorrow Sunday when can come back The specific time is not yet certain, but a more is at least sure to be guaranteed, and I will try to make up for it in the number of words, please forgive me, I hope to continue to support late at night, friends who have tickets remember to vote for recommendations! Friends who like this book should not forget to collect and promote it, thank you very much!