Crescent Academy, early morning.

Before the autumn dew evaporated, the cold wind had already arrived, rolling up the remaining fallen leaves and drifting away into the distance.

The students of Crescent Academy have already changed into winter clothes with thick black silk stockings and short suits, although they are skirts, they are designed to keep warm, so they will not feel cold even in winter, and the girls are walking on the road to the classroom in twos and threes, talking and laughing.

"Good morning, Teacher Fina."

Several students greeted Fina when they saw Fina, who was also walking on the road.

"Early."

Fina nodded slightly, not saying anything more.

The students have long been accustomed to this indifferent teacher, she does not talk much, except for class, she hardly chats, and even when she does class, she only teaches the content of the textbook, but because Fina's explanation is very to the point, she can understand it as soon as she listens, so her class is also very popular, and the students always maintain a sense of awe for this teacher.

Of course, the reason why Fina was a little uneasy today was because she felt a ripple of magic stirring through the school last night.

In the eyes of ordinary people, this ripple of magic may be like a breeze, and it will be impossible to find a trace in the blink of an eye, but Fina is more sensitive to the changes in magic power, and she knows very well that this is someone who has successfully advanced.

These students had only been exposed to magic for a short time, so naturally it was impossible for them to advance, and the other teachers had no similar signs, so in retrospect, it could only be one person.

Fina glanced at the tower not far away, where the headmaster's office was located.

Although Fina is happy that Reiner is improving, at the same time, there is also a hint of apprehension.

If Reiner became a high-level mage and entered the high-level council, would he still care about this small school, their students and teachers?

Fina has been concentrating on magic for half a year, she has worked hard to improve her magic level, under Reiner's answers, she has touched the threshold of the second ring, for ordinary mages, this is already extraordinary speed, but in Fina's opinion, she is still too weak to stand by Reiner's side, and even the back is gradually invisible.

Sometimes Fina really envies Claire for being able to stay by Reiner's side without worrying about the future.

The gap between the life span of mages and ordinary people has not been obvious in the past few years, but as time goes by, high-level mages can only watch their relatives and friends grow old and die one by one, and they will be lonely for the rest of their lives.

Fina didn't want that to happen, so she tried to catch up with Reiner.

Unlike Fina, who had mixed feelings, Reiner was in a happy mood.

The six-ring mage, the apex of the middle-level mage, he only took more than half a year to reach it, which can be said to be unprecedented in the history of mages.

When he summed it up afterwards, Reiner felt that in addition to the knowledge from the earth that allowed him to avoid many detours and make many discoveries, there were other reasons for the smooth advancement.

The first is that the feedback from the world, although at first glance it seems that there is only a mana increase, and it cannot be broken directly, but the quality of these mana is quite high, and Reiner does not need to spend too much mental effort to control these mana, they will spontaneously assist Reiner in casting spells.

The second is that when Reiner advanced to the third and sixth rings, he used spells created by himself, and these spells were undoubtedly more compatible with Reiner, and when Reiner conceived these spells, he had actually demonstrated the spell model in the heart lake countless times, so he could engrave them into the heart lake more quickly.

Reiner stood up and stretched, he was so tired last night, a full day of high-intensity precision experiments and two successive breakthroughs at night, he was physically and mentally exhausted, and after completing the advanced aftermath work, he lay on his desk, and did not wake up until the morning.

He smiled as he saw the students walking by outside the window.

At this moment, the sound of the door opening behind him made Reiner turn around.

Arimia was yawning and pushing the door open, she hadn't slept well last night, it was the book that Claire recommended to her.

Halfway through Arimia's door, she suddenly saw Reiner sitting inside, covering her face and yawning.

“......”“......”

The two looked at each other before Elimia moved.

"I must have slept too late and hallucinated."

With that, Arimia retreated as she had done and closed the door again.

It took about five seconds for her to reopen the door, this time with impeccable grace, and she said with a pretended composure when she saw Reiner, who was still sitting in her chair.

"Good morning, Principal Reiner, you're not late today."

Then he walked a little stiffly to his desk and sat down, his gestures unnatural.

Reiner smiled and said nothing, he picked up the paper he had written yesterday on the table, sorted it out, and handed it to Elimia.

"Could you please send this paper to the paper review committee for me?"

"What is this?"

Arimia took the parchment and looked at the title.

An Enlightening Perspective on the Creation and Transformation of Light.

"The generation of light? Invert? ”

Arimia was immediately curious, she had also heard of the wave theory of light and the particle theory that had been arguing in the wizarding world now, but with the theoretical knowledge that Arimia had so far, she could not make her own judgment on the content of these two theories, so she did not pay much attention to it.

It looks like Reiner was working all night in the office last night to write his paper, so that's why he's here so early today.

Somewhat touched, Arimia flipped through the paper slightly.

But she soon gave up, although Arimia was an honor student, but after becoming Reiner's secretary, her focus on learning magic was on necromantic magic, and if nothing else, at this time next year, Arimia could try the advanced second ring.

For the elemental system, or this kind of high-end content, Arimia can't easily understand.

Still, she saw the last word, Reiner's mention.

- From the photoelectric effect, it can be inferred that light has the characteristics of particles, and in the photoelectric effect, light should be regarded as a particle, and the energy distribution should conform to Stein's formula.

"Light is ...... Particle? ”

Arymia tilted her head and looked at Reiner.

Does this paper want to put an end to the decades-long dispute between the wave theory of light and the theory of particles?

Witnessing history yourself?

Since Reiner's theory has always been affirmed, and Arimia believes Reiner, she thinks Reiner's thesis must be correct.

Seeing a bewildered Arimia, Reiner smiled slightly.

"To be precise, light is a particle, but it is also a wave."

Arimia was even more puzzled.