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

Chapter 34 Experiment
[We're doing an experiment on Friday afternoon. Does anyone have any questions? ]

Xu Ling tentatively sent out an experimental invitation in the group chat.

【no problem. 】

……

No problem. +2

[It's okay. I only have one Modern History class on Friday afternoon, so I can just skip it.]

This is Huang Yunfeng’s message, and it received emojis of likes from others as soon as it was posted.

This kid is so real!
Xu Ling couldn't help but admire in his heart.

……

Since the digital microscope is the absolute main force of the entire experiment, Teacher Zhao’s laboratory is the main battlefield.

After contacting Teacher Zhao, the team members rushed to his laboratory without stopping, carrying other experimental equipment.

Teacher Zhao's laboratory is very different from Xu Ling and his students' laboratory.

The most obvious thing is that the area is larger and there are more experimental equipment.

Some larger instruments are also available.

"Teacher Zhao, thank you very much for being able to use the equipment in your laboratory."

Xu Ling expressed his gratitude to Zhao Yuanshan as soon as possible.

"Haha, you guys have to bring honor to the school too. If you have any questions, feel free to come to me."

Zhao Yuanshan replied with a smile.

"Okay, then, students, let's start the experiment according to the plan. Let's try to measure the magnification today."

Xu Ling turned around, faced the team members, and spoke loudly.

Several team members were already impatient at this time. Following Xu Ling's order, they immediately ran to the experimental table and placed the experimental equipment.

However, when everything was ready, Xu Ling discovered a problem:
There are a lot of people!
Five people were crowded around a lab table, and regardless of whether it would be used or not, they were barely able to squeeze through.

Holding his forehead, Xu Ling said awkwardly: "Um... I'm sorry, I didn't make any arrangements."

"It's okay. Just divide into two groups and do the experiment at the same time to reduce accidental errors."

Ji Yun spoke out.

Yes! Divide into two groups!
Why didn't I think of that?

Having experience makes a difference!

After thinking for a moment, Xu Ling said, "Then, I, Huang Yunfeng, and Liang Xiuyuan will form a group. Ji Yun and Mu Yuhan will form another group."

No one had any objection.

The reason why Ji Yun and Mu Yuhan were paired together was because they were both sophomores, and Ji Yun had experimental experience.

Maybe the efficiency of the two of them is even higher than that of Xu Ling and his three companions.

But there was only one set of experimental equipment, so Xu Ling had to find Zhao Yuanshan who was also doing an experiment.

"Teacher Zhao, we still need a set of equipment." Xu Ling said a little embarrassedly, looking extremely unnatural.

Seeing Xu Ling's expression, Zhao Yuanshan just laughed and said:

"No problem. The experimental equipment is empty anyway. I'll have your senior prepare it for you. He's over there. Just tell him what you need."

Xu Ling felt extremely grateful.

Zhao Yuanshan is neither their teacher nor their academic advisor, but he still takes good care of them.

Soon, with the help of my senior, two sets of experimental equipment were ready.

The experiment begins immediately!
On Xu Ling's side, Xu Ling is the main operator, and the other two are helping out.

"Diffuse reflection background plate!"

“Already settled!”

"Glass slide!"

"It's ready!"

Xu Ling continued to shout: "Micro syringe!" Huang Yunfeng on the side immediately handed it over.

Xu Ling held the syringe carefully and slowly and gently pushed out a drop of water in the center of the slide.

"Put the millimeter ruler in place! Select a mark on the object to be observed and record the actual length as 1.0 mm."

Xu Ling continued.

After saying that, Huang Yunfeng put down the ruler and Liang Xiuyuan recorded the data.

Immediately afterwards, Xu Ling operated the digital microscope and took ten photos in succession.

After it is transferred to the computer, the data of the object image is measured soon.

1.3mm.

The gross magnification is 13x.

"Wipe the slide, add the same volume of water, and repeat the experiment."

After repeating this several times and recording all the original data, Xu Ling stopped the experiment.

"Are the temperature and humidity measured?" Xu Ling asked.

"It has been measured and recorded." Liang Xiuyuan answered seriously.

With the help of a computer, the magnification was measured in just about half an hour.

Xu Ling felt a little dreamy.

When I was researching the experimental plan before, it seemed so complicated.

But actually doing it is so simple, like playing.

If it were so simple, why would I choose a main topic? Wouldn't it be enough to just do all of them?
Xu Ling couldn't help but think of it.

But Xu Ling did not take it lightly. The magnification is simple, but the measurement of resolution is still very complicated.

While Xu Ling finished measuring the magnification, Ji Yun also finished.

This was completed a total of six times on both sides, three times on each side.

The magnifications obtained are: 12.9, 13.0, 13.1, 12.8, 13.0, 13.1.

The data is very close because the volume of the water droplet is fixed, but there is also an error because although the volume is fixed, the shape is not exactly the same.

"Next, let's measure the resolution?" Ji Yun asked.

"Let's test it! We'll try to get all the experimental data today."

Xu Ling nodded and replied.

The two groups immediately returned to their respective lab tables and began measuring.

Measuring resolution is indeed much more complicated.

It is necessary to slowly move the observation field from the area with sparse micrometer scales to the area with finer scales, and carefully observe the micrometer scales in the image until the minimum distinguishable scale interval becomes blurred and the two adjacent scale lines cannot be accurately distinguished.

Record the minimum scale interval dimage that can be clearly distinguished on the micrometer at this time. The corresponding actual scale interval dobject is the resolution limit of the water droplet imaging system.

However, after recording the data and comparing the results of several experiments, Xu Ling found that there were large errors.

"The error is quite large!" Xu Ling said to Ji Yun.

"Of course, different experimenters have different definitions of ambiguity, so it's normal for errors to occur."

Ji Yun didn't look surprised at all.

"Then what should we do?" Xu Ling asked hurriedly. He was not very satisfied with the current experimental results.

Ji Yun thought for a long time and finally came up with a solution:

"First, by fine-tuning the microscope's fine focus knob, we can further focus the micrometer images at different depth levels, ensuring that the best imaging effect can be clearly observed in different fine-scale areas, thereby avoiding misjudgment caused by inaccurate focal planes."

“Second, we need to define the definition of the resolution limit.

When the contrast between two adjacent scale lines decreases to a certain level, and the gap between the two lines appears blurred when observed with the naked eye or under a microscope, and cannot be clearly distinguished after multiple refocusing and adjustment of the observation angle, it is considered to have reached the resolution limit.

As a professional, Xu Ling immediately heard the feasibility.

The team immediately restarted the experiment.

(End of this chapter)