I failed a course, and the system became my study supervisor.

Chapter 39 Experimental Report Released
Just as he returned to the dormitory, Xu Ling's phone buzzed with text message notification sound again.

It’s a private message from Ji Yun.

The experimental report is almost finished, except for some theoretical derivation of the experimental principles.

Ji Yun expressed her hope that Xu Ling could complete it.

Xu Ling readily agreed and couldn't help but admire in his heart: This is efficiency!

Immediately afterwards, Xu Ling clicked on the attached file.

【Experimental report on measuring the magnification and resolution of water drop lens

Experimental principle: Due to the effect of surface tension, a water droplet in the air takes on an ellipsoidal or nearly spherical shape, similar to a convex lens...

Experimental equipment: digital microscope, small vacuum glass cover...

Experimental steps: Magnification measurement... Resolution measurement...

Data analysis...

Uncertainty statement: ...]

Ji Yun completed the entire report very well. Each section was written in great detail and the logic was very clear.

There is actually not much room left for Xu Ling to fill.

After taking a quick look at the information, Xu Ling immediately started to supplement it.

The magnification principle of the water drop lens and the principle of magnification measurement are both simple. The theoretical basis for resolution measurement is more complicated.

Ji Yun pointed out in the report that the measurement of resolution in the experiment was based on the Rayleigh criterion.

That is: when imaging through the same optical system, when the center of the image (Airy disk) formed by a point light source falls exactly on the first-order dark ring of the image (Airy disk) formed by another point light source, the optical system can just distinguish the two point light sources.

Airy disk is a physical phenomenon caused by the wave nature of light.

However, the truth was there, but Ji Yun did not prove it.

Xu Ling thought there were some issues with this, although it wasn't a new theory. But in a rigorous manner, he had to prove what needed to be proven.

After organizing his thoughts in his head, Xu Ling began to type:
When light is diffracted by Fraunhofer light through a circular aperture, the intensity distribution function of the Airy disk is I(θ)=l(0)(2J(x)/x), where I(0) is the central intensity, J(x) is a first-order Bessel function of the first kind, x =πDsinθ/λ, D is the aperture diameter, θ is the angle relative to the central axis, and λ is the wavelength of the light.

According to the properties of the Bessel function, the first zero of J(x) occurs around x = 3.832. This means that when πDsinθ/λ = 3.832, a first-order dark ring appears in the Airy disk. The corresponding angle θ satisfies sinθ = 1.22λ/D. Using the small-angle approximation, θ ≈ 1.22λ/D. This θ is the angular resolution of the optical system under the Rayleigh criterion.

......"

It took more than an hour for Xu Ling to finally complete the proof.

After checking several times and confirming that everything was correct, Xu Ling threw the file into the group chat and @ed all the members.

However, after completing the experimental report, Xu Ling did not relax.

Because the experimental report is only the first step, the team competition cannot be solved by simply submitting an experimental report, but requires a debate on the experiment.

Opponents will go to great lengths to find loopholes in their experiments and reports, while reviewers will critique their presentations and try to find issues related to their experiments.

Needless to say, this was only the first experiment. There were four more alternative questions and a dozen or so secondary questions waiting to be answered.

Besides, time is really too tight!
It’s almost May now, and every time I do an experiment I have to squeeze water out of a sponge to find time.

The more he thought about it, the more nervous and stressed Xu Ling felt. The slight sense of accomplishment he had from completing the lab report vanished in an instant.

Just when Xu Ling frowned, the experimental report caused a stir in the group.

I just read our group's experimental report. It's perfect, both in terms of experimental operation and theoretical proof.

Qin Qin praised it highly.

Liang Xiuyuan and Huang Yunfeng also chimed in, flattering him non-stop.

[As expected of a team leader, this theory is proven beautifully!]

Why do people like to hear flattery? Even someone as socially awkward as Xu Ling felt relieved after hearing it.

At this time, Ji Yun, who had been diving, bubbled up.

Thank you for your recognition and support, but the lab report is only the first step. We need to make some preparations for some related issues of this experiment and plan for future experiments!

This is professionalism! This is reliability!
Xu Ling was very satisfied, not noting that Ji Yun's actions were actually a bit overstepping her bounds. [Ji Yun is absolutely right. Please don't relax, everyone! Keep working hard!]

Xu Ling echoed.

Afterwards, after a few people in the group chatted about some irrelevant topics, the group fell silent again.

……

"Xu Ling! Come on, play a couple of games with us!"

Just when Xu Ling was still thinking about the experimental problems, he heard Yang Chaojie calling him.

Huh? Me?

Xu Ling was a little surprised: "Why are you calling me? Don't you have three people? Why are you sending someone else?"

"We're playing five-man teams today. There are already four of us, and you're the only one missing!"

Yang Chaojie sounded a little anxious.

Qin Kai and Wang Rui also joined in, saying "yes, yes".

So? Play two?
I just spent so much time writing a proof, so it would be nice to take a break.

Moreover, today is different from the past, Xu Ling believes that he will not be addicted again.

"Come on, let's play a couple of rounds. I still have some practice questions after that."

Xu Ling agreed.

"Then log in! Ionia! Kill him without a single piece of armor left!"

Yang Chaojie was very excited, and his tone was quite high-spirited.

……

The person Xu Ling didn't know was Bai Jingfeng, Yang Chaojie's cousin, and was said to be an e-sports expert.

As soon as he entered the selection interface, he locked on the jungler position and threatened to lead the team.

Xu Ling thought for a while and took out his signature character, Lux, to play as a support.

However, from the very beginning of the game, it was far from what Yang Chaojie had expected, and the situation became increasingly unfavorable.

"Assist! Assist! Where are your wards? The map is completely black, how can we fight?"

Bai Jingfeng was the first to criticize.

"Why didn't the mid laner give a signal?! Qin Kai, why are you still so bad?"

Yang Chaojie followed closely behind.

After a while, the team room was filled with cursing voices, and only Xu Ling remained silent.

As expected, I lost the game, and lost twice in a row.

"Well... I don't want to play anymore, I don't want to play anymore." Yang Chaojie looked frustrated, his voice was much lower, and he looked at Xu Ling, wanting to say something but stopping himself.

It was Qin Kai who spoke out Yang Chaojie's true feelings:

"Xu Ling, why are you so bad? Didn't I see you fighting often before?"

What words! What words is this!

Xu Ling's mouth twitched, and he managed to find an excuse: "I'm a little unfamiliar with this. Don't call me next time."

Unexpectedly, the three roommates had no regrets, but were enlightened instead.

Can you win if I don’t play?
Xu Ling saw it and felt pain in his heart.

A rising star in the e-sports circle has fallen.

Studying is still suitable for me!
Xu Ling thought helplessly.

(End of this chapter)