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

Chapter 35 Methods of Improving Resolution
Next, the team strictly followed the two suggestions made by Ji Yun just now, and spent more than an hour to finally complete the resolution measurement.

The results are much better than last time. The error has been significantly improved, and it is estimated that the uncertainty of the final calculation can be slightly reduced.

The final resolution is: 0.12 mm.

For a water drop lens, being able to reach 120 microns is already very good.

However, Xu Ling was still not very satisfied. He believed that if its resolution could be improved, it would definitely help with the final experimental presentation.

"Ji Yun, is there room for improvement in resolution? What should I do if I want to improve it?"

Xu Ling looked at Ji Yun and asked.

"There is a very intuitive method!" Ji Yun blurted out.

Ok?
An intuitive approach?
Xu Ling was full of doubts and asked again: "What method?"

"Vacuum!"

Ji Yun answered decisively.

Vacuuming? Xu Ling immediately began to think about whether this method was feasible.

The rest of the group also fell into deep thought.

After a while, Xu Ling suddenly realized something and said to everyone, "We can create a vacuum! On the one hand, it can reduce the impact of airflow on the water droplets, and on the other hand, it can make the shape of the water droplets more similar to a sphere.

Due to surface tension, non-wetting liquids will take on a spherical shape in a vacuum.

We can create a near-vacuum environment and make it into a beautiful ellipsoidal shape, so it shouldn't be a problem."

However, no one looked happy, especially Mu Yuhan.

"It's so troublesome to evacuate the air and then measure the data. Why should we waste time and energy on this? Why not just turn around and do something else?"

Mu Yuhan asked in confusion.

Xu Ling understood that they were unwilling to do this seemingly thankless task, but it was worthwhile to do it.

Xu Ling took a deep breath and said seriously:

"Academic competition! What is competition? It's about comparing who's better. Anyone can do simple experiments, but how can we gain an advantage without further experiments?

Besides, this topic is our first choice. If we are so perfunctory with our first choice, do you think the alternative topics will be good?"

For a while, several people were silent.

After a while, Mu Yuehan said solemnly: "I didn't think it through. You are the team leader, you have the final say."

But there was no sign of her bowing her head.

The remaining Huang Yunfeng and Liang Xiuyuan had complicated expressions, and there was some evasiveness in their eyes when they looked at Xu Ling.

Well, it's not surprising that they have such thoughts. The current academic environment is very impetuous, and many studies are superficial.

Influenced by this atmosphere, they are somewhat afraid of difficulties, which seems understandable.

But Xu Ling couldn't accept it. If he wanted to escape at the slightest difficulty, who would climb to the peak of science?
A foreigner?
……

Just as Xu Ling was frowning and thinking, Zhao Yuanshan's voice came from beside him.

"That's right! We shouldn't shy away from scientific experiments just because they're too much trouble or too difficult. Xu Ling put it very well!"

Zhao Yuanshan's tone was full of appreciation.

Xu Ling was somewhat flattered and quickly said, "Haha, Teacher, you're too kind. It's well deserved."

Zhao Yuanshan was very satisfied. There were not many students nowadays who could have such awareness. If Xu Ling had not been participating in the competition, he would have wanted to bring Xu Ling to his laboratory immediately.

"For the next experiment, please tell me what equipment you need and I'll have my senior arrange it for you. If our lab doesn't have it, I'll lend it to you!"

Zhao Yuanshan was very happy and his tone of voice rose noticeably.

Xu Ling also wanted to get the equipment and complete the experiment right away, but unfortunately, the time agreed upon today was running out.

Xu Ling didn't want everyone to rush through the experiment. The operation of vacuuming and measuring data was so complicated that rushing would only have a counterproductive effect.

"Teacher Zhao, we don't have much time today. Thank you for your kindness. We will find another time next time."

Xu Ling said. "Okay, okay. Experiments can't be rushed! So next time you come, please contact me in advance. I'm always welcome."

Zhao Yuanshan patted Xu Ling on the shoulder, his tone still revealing appreciation.

After saying goodbye to Zhao Yuanshan, the group members dispersed.

Holding all the experimental data for today, Xu Ling walked out of the laboratory building alone.

"Eh? Xu Ling? Are you guys doing experiments here too?"

Not long after he walked away, Xu Ling heard Qin Qin's voice behind him.

Out of politeness, Xu Ling turned around and nodded.

"Eh? What's wrong? You're feeling so down."

Qin Qin asked with some concern.

Xu Ling did not answer.

"You said--" Qin Qin deliberately dragged out the last sound of the word.

Xu Ling had a headache and had to tell her about the resolution.

"Do you think I'm doing the right thing?" Xu Ling asked in a deep voice.

"You did a great job. What's wrong with that?" Qin Qin asked back.

Xu Ling didn't know how to answer. He paused before speaking, "But it seems my team members aren't very happy about it. It's like I'm forcing them to do it."

"That's their problem. What's wrong with doing an experiment to the best of your ability? That's what scientific research is all about, right? If you can't do it, then don't do it!"

Qin Qin's tone was actually a little angry.

After hearing her answer, Xu Ling felt much better.

Ji Yun, Zhao Yuanshan and Qin Qin all recognize me, so I must be right.

Xu Ling thought secretly.

Xu Ling still had dinner with Qin Qin.

Perhaps seeing that Xu Ling was not in a very good mood, Qin Qin never teased Xu Ling again.

Instead, he would say a few indignant words from time to time, which made Xu Ling feel a little amused and helpless.

……

When I returned to the dormitory, my roommates were still making a lot of noise.

Xu Ling was already used to it. He took out the experimental data and started studying it as if no one was around.

The experimental data is very simple and not complicated to process, and manual calculation is more than enough.

But what Xu Ling wanted to see was the uncertainty of the current experimental data.

This is necessary preparation for writing an experimental report.

Uncertainty is a parameter associated with a measurement result that characterizes the dispersion of the values ​​that can reasonably be attributed to the measurand.

Simply put, uncertainty can be used to evaluate the reliability of data.

Uncertainty can be divided into standard uncertainty and expanded uncertainty. Standard uncertainty can be further divided into Class A and Class B.

What Xu Ling has to do is to calculate the Class A and Class B uncertainties separately, then calculate the combined uncertainty, and finally further calculate the expanded uncertainty.

In the end, Xu Ling calculated the combined uncertainty to be 6% and the expanded uncertainty to be 7%.

Too high!
Sure enough, today's experiment is still not sophisticated enough.

For general scientific research experiments like today's, both types of uncertainty should be controlled below 5%.

Even though 6% is only one percent lower than 5%, one percent is already one-fifth of 5%.

Further experiments are imperative!
(End of this chapter)