When light shines on a charged object and causes the charge to oscillate, a driving force, or radiation Light Pressure, is generated in the direction of the light beam.
From the momentum generated by each absorption and radiation of the atom, we can obtain:
2<△p^2>=2^2*ω0^2/c^2
Therefore, the total change in momentum over time t is:
2<△p^2>
Therefore, the change in momentum of the atom upon cooling is:
p0^2=12<△p^2>γpm/(2β)=3 mγ[2∣δ∣/γ+γ/2∣δ∣]/4
The propulsive momentum transferred by light per second is equal to 1/c multiplied by the energy absorbed from the light per second; that is, the momentum transferred by light is always:
Shen Qi filled the left side of the blackboard with his writing, and he also filled about half of the right side, breaking one of the chalk pieces in the process.
The laboratory was so quiet you could hear a needle go through it. Teacher Mu and the other team members were watching Shen Qi's performance.
Shen Qi's personal experience from participating in a math competition last year was that a level 3 math proficiency is sufficient for Provincial First Class competitions.
Level 6 Mathematics provides a real boost to lower-level Physics; that's how the system is set up. Under the guidance of his Mathematics father, Shen Qi's practical Physics skills have improved compared to his current level.
If this were a symphony of physics, Shen Qi's performance at the beginning would be excellent, at least it would appear so.
A magnificent movement deserves an elegant ending for a perfect performance. After a blackboard full of deductions and explanations, Shen Qi gave the answer: the minimum temperature value is:
Tmin = 2.4 * 10^-4K
That is, 2.4 times 10 to the power of negative fourth Kelvin, which is a value very close to Absolute Zero.
"Solution complete." Shen Qi put the half-burnt chalk back into the trough and patted the chalk dust off his hands.
Snap, Teacher Mu snapped her fingers as usual, "Correct answer, clever."
"Teacher Mu, you can only see the negative fourth root of 2.4 times 10 in the laboratory, right?" Shen Qi asked Teacher Mu, exchanging ideas.
Teacher Mu said, "In 1985, Mr. Zhu successfully completed the laser cooling experiment of atoms. The experimental temperature at that time was exactly 2.4 times 10 to the power of -4 Kelvin. Today in the 21st century, scientists can achieve picoKelvin-level cooling in the laboratory, which is on the order of one trillionth of a degree above Absolute Zero. Applied physics is developing rapidly, but Theoretical Physics is the fundamental support." She also has idols; those physics giants are her idols.
"Is all physics true?" Shen Qi asked again.
Teacher Mu replied firmly, "Of course!"
"So, after all that, Teacher Mu cited Professor Zhu's experimental case." Shen Qi turned around and glanced at the blackboard. Interesting. Physics is actually quite interesting.
Teacher Mu chuckled, "When it comes to the national finals or international competitions, the examiners are very keen to adapt past Nobel Prize in Physics cases. Broadening one's horizons can't hurt, can it?"
"Indeed." Shen Qi nodded.
Teacher Mu and student Shen Qi chatted and laughed as they asked and answered questions, leaving the dozen or so Physics Competition Team in the audience dumbfounded.
"Why is Shen Qi so good at physics too?"
"Could it be that we've been learning fake physics?"
"We can't afford to offend them."
"This guy is really someone we can't mess with."
"Boss."
"An absolute big shot."
"My empire of the Physics Competition Team is gone..."
There was a chorus of groans from the audience, but the team members also greatly admired Shen Qi; their feelings were complex and hard to put into words.
"I'd like to learn from you." Shen Qi respectfully cupped his hands to Teacher Mu.
"I apologize for disturbing you." Shen Qi clasped his hands in a fist salute to the dozen or so Physics Competition Team below the stage, then turned and left.
"Hey, Shen Qi!" Teacher Mu chased after him.
The team members stared at each other in disbelief. "Ten steps, one kill; a thousand miles, no trace left!"
"Having accomplished their task, they left without a trace, concealing their merit and fame!"
"My song lingers with the moon, my dance leaves my shadow scattered!"
"A long wind blows for tens of thousands of miles, passing through the Jade Gate Pass!"
"There's a big shot at No. 2 Middle School, a bigwig named Shen Qi!"
"Show off and run, that's fucking thrilling!"
The Physics Competition Team in the lab were in an uproar.
"This was so unexpected! Our Physics Competition Team are all honest and law-abiding people. We just attend class properly and haven't done anything to anyone. Shen Qi, why did you barge in and unleash a barrage of electric shocks?!"
"Shen Qi, what do you take our Physics Competition Team for? You think you can come and go as you please?"
"Bai Lingye, you coward! Shen Qi is gone, what are you babbling about? If you had the guts, why didn't you just confront him head-on!"
"What the hell... how am I supposed to anal?"
Suddenly someone sensed something was wrong. "It's the fifth day of the Lunar New Year, why did Shen Qi have to come at this time of year? There must be a traitor in our ranks! Lin Xingyu, tell me, are you the traitor? Did you bring the Japanese into the village?"
"Yes, it must be Lin Xingyu. Shen Qi was sitting next to him just now, and they seemed quite familiar with each other!"
"Comrades, please don't misunderstand. I joined the team in my first year of high school, so I'm considered a veteran member. I'm extremely loyal to the Physics Competition Team!" Lin Xingyu cried out in protest, though he was actually quite guilty inside. He quickly put away Shen Qi's draft paper; it was the master's manuscript, and carrying it around would boost his fighting power.
Outside the lab, Teacher Mu caught up with Shen Qi and asked, "Hey, you're leaving already?"
Shen Qi said, "Today is the fifth day of the Lunar New Year. I have to go to my uncle's house for lunch. His house is quite far away."
"Visiting relatives is a must, it's only natural. By the way Shen Qi, are you still participating in this year's math competition?" Teacher Mu asked.
Shen Qi shook his head. "I'm not planning to participate anymore. I've already gotten everything I was supposed to. For the next few months, I won't spend more than two hours a day on math, focusing on consolidation and review. This is necessary; taking a break is for bigger strides in the future."
"Since you're just killing time anyway, why not join the Physics Competition Team?" Teacher Mu was eager to recruit talent.
Shen Qi remained noncommittal. "I'll think about it."
"No, the physics competition starts at the end of March, the preliminary rounds." Teacher Mu desperately needed reinforcements.
"By the way, Teacher Mu, where did you get your doctorate?" Shen Qi changed the subject.
Teacher Mu: "The Physics Department of Yenching University."
"This... so it's Senior Sister Mu!" Shen Qi was a little surprised. "Senior Sister, you're a female PhD in the Physics Department from Peking University, how come you're a teacher at our school?"
"Is our school bad? It's a top-tier high school in the city, okay? We're hiring teachers now, starting with a master's degree, no upper limit. Hey, stop asking me questions, just get to the point, are you joining the Physics Competition Team, junior?"
"If you're Teacher Mu, then I'll think about it. If you're Senior Sister Mu, then I won't think about it anymore, come on."
Shen Qi thus became a member of the physics competition team at Nangang Second High School.
In the nearly 100-year history of Nangang Second High School Middle School, there have certainly been students who participated in more than one subject competition, but there has never been a student who won the highest award in different subject competitions one after another.
In the midst of laughter and conversation, Shen Qi joined the Physics Competition Team of Nangang Second High School. Even if he boasted to the heavens, he could only win awards in two subject competitions at most during his high school career.
Time is running out for Shen Qi.
(Today is Lunar New Year's Eve. I spent the day at a relative's house helping my niece with her elementary school winter vacation homework. In the evening, I had a family reunion dinner and watched the Spring Festival Gala. I couldn't write anything, so this chapter is a saved draft that was automatically uploaded. That's all for today. I wish everyone a happy Spring Festival and all the best.)