"In the last class, we learned about 'length and time'. Today we will start teaching the definition of speed, and...

"…speed is a physical quantity used to indicate the speed and direction of an object's movement, and the rate is..."

“…speed is relative, not absolute…”

...

...

After processing the food in his hands, when the students from the ninja school came back and finished their dinner together, Kaguya paused and started today's "Intensive Improvement" course.

After taking a look at the wall clock on the rear wall, Kaguya's speech speed accelerated by two points and explained the last knowledge point.

"...this ends with today's new knowledge. Since you have understood the definition of speed, I'll ask you a question."

Clearing his throat, Kaguyayu looked at the dozen little kids below and asked, "What is the fastest in the world? If you answer correctly, you will be rewarded."

When they heard that there was a reward, the children who were not interested in this issue also started to think about it and started to think about it.

After waiting for a minute, Kaguya asked, "Did anyone guess the answer?"

"It's missing, missing is the fastest!" Someone immediately raised his hand and spoke.

Kaguya's eyes twitched, and he did not choose to suppress the other party's enthusiasm. He asked patiently: "Why does Kazuya think so?"

He is also a second-year student in the ninja school. He has short light gray hair and a handsome face.

Kazuya explained: "I have seen it in the book, which says, 'No matter how far apart the person you love, as long as you keep missing you all the time, the other party will definitely feel your feelings.'"

"Uh..." After hearing this, Kaguya was covered in black lines and added: "Thinking about something that does not exist is not counted, only examples of real objects."

"Dean, I!"

"Look, you'll talk first."

With permission, the little boy said excitedly: "It's a voice, right? Just open your mouth and the other party can immediately hear what we are talking about."

Lin Yuyu, who was sitting in the front row, curled her lips disdainfully: "Idiot, how could the voice be the fastest thing?"

Since she has long been literate, she also takes intensive improvement classes with students studying at ninja school every night.

"Then what do you say!"

"Of course it's lightning."

Lin Yuyu Yuli held his hands in his chest and said proudly: "Divid distance by time equals speed.

Every time lightning falls to the ground, the sound of thunder comes, which proves that lightning is much faster than the sound."

"Idiot Yuri, it's light!"

Infected by the atmosphere in the classroom, Terumi Mimi couldn't help but speak, "We first saw the light from the lightning, and then heard the sound."

She didn't want to cheat and got involved in this discussion.

Because she had asked Brother Xiu the same question before, the other party gave her the answer.

The fastest thing in the world is ‘light’.

"How can you see the lightning emitted by the lightning if it doesn't fall?" Lin Yu Yuli retorted.

"Yes, if the light is the fastest, what about the shadow?"

...

...

"Okay, stop arguing."

Seeing that the situation was out of control, Kaguyasu hurriedly comforted him, looked at another soft round-faced little loli and asked, "Ruka, what do you think?"

"There is no fastest thing, this has a faster thing."

When he was called his name, Liuhua paused and gave a different answer.

And explained clearly: "Didn't the teacher say that speed is not absolute, but relative?

Just put the fastest thing in a Mercedes-Benz carriage, won’t it become faster?”

"A very interesting idea, I am one of my most optimistic students." Kaguya praised.

“What is the Dean’s answer?”

"Yes, Dean, please announce the answer."

“What is the fastest one?”

The other students couldn't help but feel curious and started to make excuses.

"The teacher is not sure now."

Pushing his glasses, Kaguyayu gave his own guess: "But my guess is the same as Xiao Ming, it should be light."

"Ah?" "Why do you do this?" "My reward."...

After hearing this answer, the teenagers in the audience felt like they were being fooled.

"There are rewards for answering questions this time." Kaguyasu's words made everyone in the classroom cheer.

"Practice is the only criterion for testing truth."

Take out a seal scroll from your arms, Kaguchi smiled and said, "Since there is no answer, let's find this answer together.

See what the fastest thing in the world is.”

"How to find it?" Everyone was puzzled.

"Everyone comes to the yard with me."

After greeting him, Kaguyasu came to the office next to him, called Yayin together, and came to the front yard of the orphanage.

After looking at the dozen or so little kids behind him, Miyin said curiously: "Captain, what are you planning to do?"

"Do an experiment." Kaguya stopped talking concisely.

"What experiment?"

"Michaelson Morey's experiment."

"Michaelson Morey? What a strange name, it's a bit like Yunyin's style." Miyin tilted her head.

After choosing a flat open space, Kaguyasu began to quickly seal with both hands: "Get out of the way."

After the words came, he stretched out his palm and pressed it to the ground.

Earth escape·Earth movement core!

Accompanied by the dull sound of "rumbling", a circular platform with a diameter of more than five meters and a height of about one meter slowly rose from the ground, causing the naughty children watching around to retreat.

Standing up, opening the seal scroll, cutting his finger, stretching his palm and pressing it on it, four objects appeared in Kaguyayu's arms.

Jump to the round table and place the specially treated sodium light in your hand at nine o'clock in the direction of the round table.

After adjusting the height, come to the center of the round table, stand two identical glass spectrometers in your hand on the round table, and carefully adjust the angle to make it at an angle of 45° with the light beam emitted by the sodium light.

Finally, at six o'clock, a black wooden board was aimed at the glass spectrometer and fixed it vertically on the round table.

When he arrived at the round platform, Tomimi's eyes were full of curiosity: "Brother Xiu, what is this?"

"Interferometer."

Terumi Mimi whispered to herself: "Interferometer? Why have you never heard of such things before?"

Having not answered the other party's doubts for the time being, Kaguyasu once came to the direction of twelve o'clock and three o'clock, and carved a straight line of thirty centimeters long on it.

Then he looked at the beautiful girl not far away and ordered: "Miyin, please condense two ice mirrors in these two lines."

"OK."

Nodded, Miyin closed her hands together and said lightly: "Secret Art·Morning Mirror Ice Crystal."

The next moment, two square ice mirrors that were as smooth as mirrors condensed from the air, filling the straight lines drawn by Kaguyasu.

Calibrate the position and height of each instrument again and confirm that it is correct.
Chapter completed!