“Yugadimuleviosa.”

The desk in front of Jon flew up under the influence of the spell, but it was only twenty or thirty centimeters above the ground, so there was no way to rise up any further.

While studying the memory balls sent by grandma, Neville was gnawing on the apple and looking at Jon with a desperate look on his face.

"It's been a month, a whole month! On average, you have to practice this spell more than a hundred times every day! I dreamed every night that the sound of floating spells is everywhere. You are really successful enough, Jon! Last time Professor Flevy said that at least your level in floating spells has reached the standards of most adult wizards. What you lack now is that the age magic has not grown, and you really don't need to practice anymore!"

Jon was still looking at the desk floating in front of him and thoughtfully.

"Yes, Professor Flevy said that my skills in floating curse are high enough, and the rest can only be achieved by time to accumulate my own magic and experience. But why is the maximum effect I can achieve now?

"That's all?" Neville stared at the dead fish's eyes. "What you fly with the spell is not feathers, not parchment, nor textbooks, but a desk! Now how many people in this carriage can do this level besides the professor?"

"This is not a question of whether others can do it, but the spell of floating curse itself makes people feel very problematic." Jon frowned.

Neville bit the crispy apple and looked at Jon who finally stopped to use the floating curse, and also happily chatted with him to make his ears less torture.

"What's wrong with the floating curse?"

“What it can do is a little too small.”

Jon thought, subconsciously turning his wand with his fingertips. He liked to turn his pens when he solved the problem in his previous life, and now he has brought this habit to this world.

"Even Professor Flevy, the floating spell he used cannot allow too heavy objects to fly up. This is not only because magic and will limit him, but the spell itself cannot exert this effect."

Neville could no longer understand what Jon was saying, so he could only keep nodding in agreement, repeating the three consecutive recognitions of "Yes, yes, that's it."

"But the spell of floating spell has been created for so long. In history, many wizards have tried to improve and innovate it. Now what we have learned is the limit it can reach, the limit of magic controlling the flight of objects..."

"One is the limit of floating spells, and the other is that spells cannot be released to the wizard. These two problems that cannot be solved are combined, which leads to the way wizards conquering the sky by relying on flying brooms and magic carpets, which are ancient magic tools that have been used since the Middle Ages."

"But since both the flying broom and the magic carpet can fly so high, why does the floating curse have a limit?"

"I still have the limit to eating apples, and I'll be full when I eat two." Neville threw a clean apple towards Jon, "Don't think about it for now, try it, it's very sweet."

Jon, who was thinking hard, certainly did not notice the apple flying towards him. The apple hit his head without any surprise.

"Bang!"

"Ah! Sorry, I didn't mean it, I thought you could catch it."

Navi apologized in a hurry. After being hit, Jon was stunned at first, then looked at the apple that had fallen to the ground with a strange look on his face.

"Navi, why did you think Apple hit me?"

Neville was also stunned by Jon's question, and his eyes looked at Jon even more nervous.

"Are you okay? Are you dizzy? Why don't I take you to see Professor Slughorn?"

"Because the apple will fall."

Jon's eyes glowed at the apple, and he ignored Renavi, but said the answer on his own.

"My ideas have always been limited! This world not only has magic, but also science!"

"When you throw it out, you provide it with an upward force, but in fact there is a downward force pulling it back to the ground!"

Neville had grabbed Jon's arm.

"Let's go, hurry up, while you haven't done anything stupid, let the professor see if you can save me!"

Jon slapped his hand with a dark face.

"I wasn't fooled by the apple! I don't need to let the professor treat me. I'm thinking about the problem seriously. Have you ever thought about what you were thinking in your mind when you cast a floating curse?"

Seeing that Jon didn't seem to be lying, his performance was indeed normal except for nonsense, Neville replied hesitantly.

"It is what Professor Flevy taught us in class that he firmly believes that the target of the wand can fly up and then chant the spell and swing the wand."

"Knowing the truth but not the reason is always a feature of magic." Jon's voice was very calm, but he could see his abnormal excitement. "Just when turning a match into a needle, the professors would not teach us what kind of molecular structure changes will occur within the object when the wood is transformed from a metal."

"The same is true for floating curse! Professor Flevy just told us to unswervingly think that we could make the feathers fly, but did not tell us what principle it would take to do so. Then the floating curse we used showed the simplest and most direct way of expression - forming an upward force on the object itself, saying it was flying, but it was actually the power of magic that lifted it up!"

"Magic is an intervention in the rules. The wizard proposes the idea of ​​change, and the way to change is determined by the magic itself!"

"But what if we take the initiative to choose and specify how to intervene in the rules of magic when casting?"

Neville couldn't understand what Jon was saying at all, but his mouth was open and although he didn't understand, he could feel that his roommate obviously had something amazing now!

"Do you know why the apple hit me in the head?" Jon asked this silly-looking question again.

Neville also answered a very stupid answer: "Because I threw it at your head."

"A Muggle, who was also hit by an apple in the head more than three hundred years ago, was also thinking about this question, but he came up with the answer himself."

Jon's face showed a smile, which was the smile of the wizards who had no exploration of the rules of the world.

"There is a force in the land where we live, which pulls all objects on the ground, the ocean and even the sky. The Muggle named Isaac Newton calls this force - gravity!"
Chapter completed!