"But that's okay! Actually, your IQ is not much worse than his!It's just that he is now at CERN and has more advanced equipment than you, so I suggest you change your field of study!" Professor Weiss comforted, now that he has included this dish in his plan, it is necessary to help him regain his confidence, if Sheldon is completely discouraged by Lu Qiujian, it will be more than worth the loss.

Professor Weiss took Sheldon's shoulders affectionately and pulled him in front of the photograph on the wall, which of course was much smaller than Professor Dietrich's, "Look, this is LIGO." "These two long, perpendicular arms, each four thousand meters long, have mirrors hanging from the ends of the arms, and the pipes are made of stainless steel, with a diameter of 1. 2 meters, at the intersection of the two arms, the beam emitted from the laser light source is divided into two, respectively into the two hollow cylinders that are perpendicular to each other and maintain the ultra-vacuum state, and then reflected back to the original starting point by the mirror surface of the terminal, the laser beam is reflected back and forth in the arm about 50 times, so that the equivalent arm length increases greatly, so that the interference fringes will be formed, if there are gravitational waves passing through, it will cause space-time deformation, the length of one arm will be slightly longer and the length of the other arm will be slightly shortened, so that the optical path difference will change, so the laser interference fringes will change accordingly. ”

By sending a laser back and forth between the interference arms, the detector will record slight changes in the distance between the mirrors. It's like waves in a pond, you put leaves on the surface of the water, and when a wave passes by, the leaves will rise and fall!" Sheldon quickly understood how LIGO worked, "but only one detector can't really determine gravitational waves, and the information he detects can also be interference!"

"Yes, that's why we have two identical instruments in Livingston, WA and Hanford, New Jersey. The distance between them is 3,000 kilometers, and it is unlikely that the same interference will affect both detectors at the same time! Only when these two detectors detect the same signal at the same time, will we be sure that it is a gravitational wave!" Professor Weiss said eloquently, "Of course, if there are more detectors, then the data detected will be more accurate!"

"But the National Science Foundation isn't easy to apply for! You know. LIGO was born because the United States canceled its own SSC collider program, and then we used the remaining part of the funds to build the LOGO, which cost this cute guy 3. $500 million in funding. If the SSC is successfully completed, maybe Sheldon will not have to change the field of study, but now he can only rely on the LOGO, "Although we still want to build one in India, but on the issue of funding, the United States and India have not reached an agreement." ”

"Why in India? I don't like curry!" Sheldon remembered his roommate, Rajesh. That's not a good impression.

"Hehe, this is just a planned thing, even if there is a fund to upgrade LIGO at present, the existing detection range is still a little close! We need to increase it tenfold!" Professor Weiss was in a very happy mood now, and he turned out a large stack of materials from the cabinet behind him, and Sheldon looked at it as if he was reflexively shaking, and then reacted that this time it should be LIGO's information instead of Lu Qiujian's article, and he was relieved.

"You'll take a look at these things in the next few days! I'll take you to New Jersey when you're familiar with the information!" Professor Weiss didn't notice Sheldon's strangeness. happily handed the materials to him, "There are some things about mathematics in it, which may be a little difficult." But if it's you, it shouldn't be a big problem!"

"Okay, I think I'll be able to read it in a few days!" Sheldon said after measuring the thickness of the material, and did not pay attention to Professor Weiss's reminder.

Watching Sheldon return to his room with a stack of documents, Penny and Rajesh, Leonard and the others looked at each other. I didn't dare to speak, I was wondering if he would make that weird scream again tonight!

"Rajesh, why don't you go and persuade Sheldon? I always get a breakdown when I have a headache when I'm studying! Sheldon won't be broken, right?" Penny asked with concern.

It's normal for you to have a headache, can you compare it to Sheldon?, Rajesh muttered, "Let's wait." Maybe he's got something different today than usual?"

"Cut, it's so easy!" Before he could finish speaking, Sheldon's disdainful laughter could be heard in the room, and Rajesh shrugged his shoulders to look at Penny and whispered, "Look, he's recovered!"

"That's good! I'll go out first, there's an audition in the afternoon! You guys help keep an eye on Sheldon!" Penny breathed a sigh of relief, and went out with a relaxed mood ready for another failure.

The laughter continued for two hours, then suddenly fell silent, and after a long time, Sheldon rushed out again with a thin pamphlet in his hand, and walked to the door without looking at Rajesh and Leonard.

"Sheldon, where are you going?" Rajesh quickly stood up.

"I'm going to UCLA, I have some questions for Terrance!" Sheldon replied without looking back, and then rushed out the door like the wind.

In the office building of the UCLA Department of Mathematics, Tao Zhexuan, the youngest mathematics professor in the history of UCLA, was talking to his girlfriend on the phone, and Sheldon rushed in and put the pamphlet in front of her, "Terrance, I'm in some trouble, tell me how to understand here?"

"Baby, I'm sorry Sheldon is here, I'm afraid I'm going to hang up the phone, I'll call you later!" After comforting his Korean girlfriend Laura, who is also his student, Tao Zhexuan picked up the pamphlet and read it, he was used to Sheldon's behavior for a long time.

In the end, it is a monster with an IQ of 230, Tao Zhexuan quickly found the place that bothered Sheldon, "Sheldon, you must not have been on the math version of arXiv recently, there is an article on it that just explains this problem!"

"I just got back from Germany, and I haven't been to arXiv in a while!" Sheldon scratched his head and replied, "By the way, can you pull up that article for me to see?"

"Okay, I just have downloaded it! The author of this article is a true genius in mathematics, but it's a pity that he has recently shifted his main focus to physics! But he still regularly publishes some mathematical articles in arXiv, which are all extremely valuable articles!" Tao Zhexuan said as he pulled up the paper.

"Well, okay, tell me his name, I'll pay attention later!" Sheldon said as he swept over the title of the paper and the author's name, and then. Suddenly froze. (To be continued.) )

PS: Name obstacles are a big problem, but sometimes something funny happens