Under the gaze of thousands of eyes, the swinging iron ball slowly knocked down the wooden bar representing fifteen scales.

The marks left by the pendulum on the sand table look like slender petals, revealing an ultimate beauty!

This is the engraved line that represents the truth of magic! Lin En pointed at the sand table and looked at Yolande, saying jokingly.

"I think that's pretty clear, isn't it, Mr. Yolande?"

"This is the evidence you are looking for! The rotation of the planet is not without any influence, but this force must be amplified by the pendulum before it can be directly displayed in front of you and me."

Yolande sat on the ground with a pale face, staring at the iron ball that was still swinging without saying a word.

A wizard from the prophecy school beside him was shouting hysterically, "This is impossible, this is impossible! You must have cast a spell on the pendulum!"

As soon as these words were spoken, several great wizards on the scene couldn't help but frown, looking a little unhappy. Could it be that they couldn't feel whether there was magical fluctuation or not?

Lin En looked at those wizards of the prophecy school who were still unwilling to accept the facts, shook his head and spoke.

"The materials I used are not difficult to obtain, right? Anyone can perfectly replicate this experiment under the same conditions..."

"The truth is there, and it cannot be moved by anyone's will. The reason why this world has day and night is because of the rotation of the planets, and the change of seasons is related to the movement of the sun's direct point..."

Lin En stretched out his hand and used several water masses to simulate the orbital motion of celestial bodies. He gave everyone a unique astronomy lesson using the simplest words.

The wizards present were fascinated by what they heard. No theory had ever explained the changes of day and night, the four seasons, and the movement of the stars so clearly.

The mysterious veil of the world seems to have been suddenly lifted. Although what is revealed is only the tip of the iceberg, it is enough to make people feel shocked.

Even after Lin En finished speaking, the hall of the seminar was still so quiet that you could hear a pin drop, and everyone was immersed in thinking about the laws governing the movement of planets.

The silent silence lasted for several minutes. As more and more people came to their senses, thunderous applause broke out in the seminar hall. Some people even took off their hats and bowed to Lynn, while others shouted loudly to express their excitement.

"What a brilliant and irrefutable theory!" August also applauded and spoke in an appreciative tone.

The exquisite and regular star images shown by Lynn made Raphael's brain tremble, and countless inspirations flooded into his mind. If the seminar had not ended yet, he would have been eager to go back and turn his inspiration into sculptures.

"I knew you could do it, Professor Lin..." Philip excitedly walked forward and hugged Lin. He had already seen the Silver Moon Medal waving at them.

Lydia, Elroc and others looked at Lynn with eyes full of admiration and longing. Pierce even fantasized about the day when he could be like Professor Lynn, expounding on his own researched magic theories under the spotlight of the crowd and receiving applause from the audience.

"Lydia, Johnny, Elroc, and Peirce, why don't you record the movement of the pendulum and the time it takes to pass each tick? You should also know the length of the wire rope and the weight and circumference of the pendulum clearly. Draw its movement curve and calculate various data. This is your homework today!"

"Ah?" Pierce, who was originally immersed in fantasy, was immediately pulled back to reality, his face immediately drooped. Why is there such a thing as homework in Greenmill?

"Have you all written it down?" Alok quickly looked at the two witches beside him.

Lydia shook her head. She was staring at the swing of the pendulum and felt dizzy.

"I have recorded it. The length of the wire rope is sixty meters, the weight of the pendulum is thirty kilograms, the time for each deflection of one scale is five minutes and three seconds, and the swing period is..." Johnny revealed all the data he had recorded.

Alok and others looked at Johnny and were so moved that they almost cried.

You are our savior! Compared to Lin En, who was the focus of everyone's attention and became the absolute focus of the venue, the wizards of the prophecy school all looked dejected. They spent more than a hundred years and expended countless efforts to observe the laws of the movement of the stars before drawing a perfect star map.

As a result, someone told them that this star map was actually wrong, and their efforts were in vain. What they were standing on was not a continent, but a rotating sphere...

Under such a huge blow, the wizards of the Prophecy School were almost collapsed. For a moment, it seemed as if the whole world was about to collapse! "Cheer up, we haven't lost yet. This pendulum experiment only proves that there is a strange force affecting the movement of the iron ball." A witch from the Prophecy School stood up and said firmly.

"But apart from the Coriolis force, what else can affect the movement trajectory of the pendulum?" Yolande was almost in despair. After all, such a large pendulum was just there, and Lin En did not cast any magic on it.

"Have you all forgotten? Lord Harof is studying a theory of gravity using the star data we provided. If there is any force that can affect it, I guess it must be gravity!" the witch said loudly.

Upon hearing this, Yolande and other wizards from the prophecy school were immediately cheered up and regained some confidence.

Yes, if their research was wrong, then how could the legendary wizard Lord Harolf discover the mystery of gravity from the data of these stars.

Could it be that even the great legendary wizards could not see these mistakes? Yolande knew that Lord Harrof's research had reached the most critical moment. It was a great theory that could change the entire magical theory of the wizarding land! After all, this involved the mysteries of space and time magic! Just as Yolande and the others were thinking about it, the door to the magic seminar was suddenly opened.

No, "open" is not quite the right word. In order to ensure that the progress of the seminar is not disturbed, the door had been locked long ago.

And now, the doors on both sides have fallen to the ground with a loud bang...

(End of this chapter)