In the Harry Potter Without Harry Potter -
Chapter 47: Gravity
"Wingardium Leviosa."
The desk in front of Jon flew up under the effect of the spell, but it was only twenty to thirty centimetres off the ground, and there was no way to raise it further upward.
Neville, who was exploring the Remembrall sent by his grandmother while nibbling on an apple, looked at Jon with a lifeless expression.
"It's been a month, a whole month! On average, every day you practice this spell more than a hundred times! The sound of the levitation incantation keeps ringing in my ears every night in my dreams, you've already mastered it enough, Jon! As Professor Flitwick said last time, you have already reached the standard of most adult wizards in the levitation charm, and all you lack now is the magic power that has not yet grown due to your age, so you really don't need to practice anymore!"
Jon continued to look at the desk that is floating in front of him thoughtfully.
"Yes, Professor Flitwick did mention that my expertise in the levitation charm is high enough, the rest can only rely on our own magic power and experience that can only be accumulated over time, but why is the maximum effect that I can achieve now is still only this?"
"Only this?" Neville glared with dead fish eyes, "what you used the magic spell to levitate is not a feather, not a parchment, not a textbook, but a DESK! How many people on this wagon right now besides the 'Professors' can do that?"
"It's not a question of whether anyone else can do it, it's about how flawed the levitation magic spell itself is." Jon's brow furrowed with a frown.
Neville bit the crunchy apple and looked at Jon who finally stopped using the levitation charm, and he is happy to talk to him more as a way to make his ears a little less tormented.
"What fault could there be in the levitation charm?"
"It can play a bit too little role."
Jon pondered, his fingertips subconsciously twirling his wand, in his previous life he liked to turn his pen while solving problems, and now this habit is also brought by him to this world.
"Even the levitation charm which Professor Flitwick cast couldn't make too heavy objects float, it's not only due to the limitation of magic power and 'will', but the charm itself can't exert such an effect."
Neville could not understand what Jon was saying, he could only keep nodding his head in agreement, his mouth repeating "yes, yes, that's right" to acknowledge him.
"But the levitation charm was created a long time ago, and there were many wizards who throughout history tried to improve and innovate it, and what we have been taught now is the limit of what it can achieve, the limit of magic used to control the flight of objects."
"It is one limit of the levitation charm, and the other one is the lack of a possibility to use the charm on the wizard, together, the lack of a solution to these two problems has led to the fact that the wizard's way of conquering the sky now still relies on the flying broom and the magic carpet, an ancient magic tool that has been in use since the Middle Ages."
"But since flying broomsticks and magic carpets can fly so high, why is there a limit to the levitation charm?"
"I have a limit for eating apples, I'm full in two." Neville threw a clean apple towards Jon, "Don't think about those for now, try it, it's sweet."
Jon, who was thinking hard, of course, did not notice the apple that came flying towards him, and the apple smashed on his head without any surprise.
"Thud!"
"Ah! Sorry, I didn't mean to, I thought you would catch it."
Neville apologized in a panic, and Jon first froze after being hit, then looked at the apple that had fallen to the ground with a creepy face.
"Neville, why do you think the apple fell to the ground after it hit me?"
Neville was frozen by Jon's question for a moment, and then he looked at Jon with a more nervous look.
"Are you okay? Are you dizzy? Shall I take you to see Professor Slughorn?"
"The apple will fall down because of...."
Jon's eyes were glowing as he stared at the apple, and he ignored Neville and spoke the answer to himself.
"My thoughts were limited! This world doesn't just have magic, it also has science!"
"When you threw it out, you were giving it an upward force, but there was actually a downward force pulling it back to the ground!"
Neville quickly made his way and grabbed Jon's arm.
"Come on, hurry up, before you do something stupid, let's hurry up and let the professor see if you can still be saved!"
Jon slapped his hand away with a dark face.
"I didn't get smashed silly by an apple! And I don't need to let the professor fix me up, I'm just thinking seriously. Did you ever think about what went through your mind when you were casting the levitation charm?"
Seeing that Jon did not look like he went insane and that he was indeed behaving quite normally except for his gibberish, Neville replied hesitantly.
"What Professor Flitwick taught us in class, firm and unwavering belief that the target that the wand is aimed at can float, and then chant the incantation while swinging the wand."
"Knowing what's going to happen without knowing what's happening has always been a characteristic exhibited by magic." Jon's voice was calm, yet one could tell he was unusually emotional, "Just like when turning matches into needles, our professors won't bother to teach us exactly how the molecular structure of an object changes within the object as it transforms from wood to metal."
"Same thing with the levitation charm! Professor Flitwick just told us to think firmly that we could make the feather float but did not tell us what kind of principle is needed to do so, and then the levitation charm we are using presents the simplest and most direct manifestation - an upward force is formed on the object itself, what we call floating is actually just the magic power that carries it up making it almost weightless!"
"Magic intervenes with the rules and laws of the world, the wizard initiates the concept of change, and the way to make that change happen is determined by the magic itself!"
"But what if we actively choose to specify how the magic intervenes with the rules when we cast the spell?"
Neville absolutely had no idea what Jon was talking about, but his mouth dropped open, and although he didn't understand, he could sense that this roommate of his is clearly thinking of something incredible right now!
"Do you know why the apple fell down after hitting my head?" Jon asked this seemingly silly question again.
Neville also answered with a very silly answer, "Because I just threw it at your head."
"Three hundred years ago a muggle who was also hit in the head by an apple, also pondered this question, and somehow he came up with his own answer."
A smile appeared on Jon's face, the smile of a person who is standing on the shoulders of giants, and looking at wizards who have failed to explore the rules of the world to their logical limits.
"There is a force in this earth where we live, a force that pulls all objects in the land, sea and even sky, and that muggle named Isaac Newton calls this force - gravity!"
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