While the wizards in Greenriel City were studying methods to measure the speed of light, a conversation was also taking place in the manor of the legendary Speaker Harrov.

"The existing magical theories in the wizarding land are extremely rudimentary...did he really say that?"

After listening to Aurora's story, Harof couldn't help but frown. Lynn's words were undoubtedly a provocation to the entire wizarding land.

It is also a great disrespect to those pioneers who have worked hard to develop and study magic. Even if you have extraordinary knowledge, you should not be so arrogant.

"No, I think he doesn't just mean the land of wizards. The magic theories developed by the [Society of Secret Magic] are no exception. They all seem extremely simple in the face of optics..." Aurora explained, while recalling what Lin En said at the meeting.

Optics is the most important key to reveal the real world at the microscopic level...

What exactly does this real world refer to? Could it be that the world they see now is all fake? Aurora thought in confusion, but she still understood the meaning of these words.

Harof also fell into deep thought. From the previous contacts and the various novel theories proposed by Lin En, it can be seen that the [Society of Secret Magic]’s understanding of magic and this world is far more profound than theirs.

If these words are not meant to be sarcastic and arrogant, then it is worth exploring what secrets the ubiquitous light contains to deserve such an evaluation...

Harof really wanted to attend another gathering of legendary wizards and ask them in person, but he had not received any invitation until now.

Although Harof, who possessed the [Ring of Mysticism], also had the right to organize meetings with other people, this seemed too hasty. The most important thing was that he had not yet figured out the Big Bang Theory, nor had he been able to come up with any new theories that could be discussed by a group of legends.

Thinking of this, Harof vaguely understood why the gathering of legendary wizards has not been held yet. It is normal for a magical research to take seven or eight years, or even more than ten years to produce some results. An academic seminar held once a year in the Wizarding Land is already considered frequent.

"It seems that we must pay more attention to the study of optics." Harov's expression became extremely solemn, and then he looked at Aurora and asked curiously, "Do you have a way to measure the speed of light?"

Aurora is the one among them who has the most profound understanding of optics. If even she can't do it, then I'm afraid no one in the entire wizarding land can measure the speed of light.

"I think we can start with astronomy!" Aurora said thoughtfully.

What is the most difficult part about measuring the speed of light? Of course, the speed of light is incredibly fast, and they can't find a large enough venue to conduct experiments, and it is also difficult to create strong light that can travel thousands of kilometers.

As for the largest distance, it must be the universe! According to the data they calculated last year, the diameter of the entire planet is tens of thousands of kilometers, and the distance between the planets is even farther. The most important thing is that the sun above their heads is a super large luminous body. As long as the distance between the two sides is known, can't we measure the speed of light?

"That's a good method!" Harov said in admiration, but soon he seemed to have thought of something and interrupted him. "No, that's not right. When we see the sun, the light has already arrived. There is no way to measure the speed of light in this way."

"For example, the companion star of Tyr disappears from time to time. I think it rotates to the back of Tyr and blocks the sun's light, so we can't see it...

The orbital cycle of a planet should be extremely stable and regular, but this is not the case. According to my observation, the time when the companion star disappears is not uniform in a year. It is sometimes fast and sometimes slow, and it keeps changing every month..."

This strange astronomical phenomenon once puzzled her, but now she has the answer!

Because in a year, the distance between Tyr and them in the orbit of the sun is different. It takes time for the sunlight to propagate to the companion star and then reflect back to be seen by them. It will not arrive immediately. If the distance between the two stars and the Eternal Star is known, perhaps the speed of light can be inferred!

After listening to Aurora's story, Harov clapped his hands in admiration. "You've got a way. It looks like you've definitely won the Silver Moon Medal this year!"

As he spoke, Harov couldn't help but burst into laughter. This time, Lin En was afraid that he had miscalculated.

Lin En dared to publicly promise to nominate the Silver Moon Medal for the person who calculated the speed of light. Obviously, he was very confident that they would not be able to find a way to measure the speed of light in just a few days. However, the other party obviously underestimated their ability! "There is only one problem..." Aurora said hesitantly.

"What's the problem?" Harov asked with a smile.

"The diameters and distances of the planets are still being measured. We have only figured out how far the sun and moon are from the Eternal Star beneath our feet. It's not Tyr's turn yet..." Aurora said helplessly.

The method they used to measure the diameter and distance of planets was the three laws of stars and the trigonometric parallax method given by Linn. Due to the large size of the planets, the calculated data was incredible, and they often had to calculate and confirm repeatedly, so progress was very slow.

"It's been almost a year and you haven't finished the calculation yet?" Harov's expression was speechless. That was the same as not saying anything. Lin En would verify it after this seminar. They didn't have time to wait and slowly calculate it.

Aurora rolled her eyes at Harof. They still had to verify the theories proposed by Lin En this year and redraw a detailed star map. Tyr was not very important, so it was naturally ranked lower on the list.

In addition, although it is feasible to calculate the speed of light using this method, there may be some errors considering the rotation of the planet itself, and only an approximate value can be estimated.

"So we can only use the stupid method, such as repeating your original experiment again. If one kilometer is not enough, then try ten kilometers, or even a hundred kilometers!" Harov said firmly.

"In fact, there are already quite a few people preparing to do similar experiments. Their ideas are very interesting. Let's let them do it." Aurora shook her head. Since someone was helping her verify it, it would be nice to save some effort.

(End of this chapter)