After Raphael returned to the ground from the air, the first words he said stunned everyone present.

"I'm afraid it's going to be hard to go ahead with this experiment!"

"Master, what's going on, could it be that the angle of refraction of the light is wrong?" Nancy asked eagerly, but they had confirmed more than a dozen times, and each mirror was carefully placed according to the drawings.

But before Raphael could answer, Glenn sighed. "It's supposed to be a dimming light, right?"

"Not bad!" Raphael nodded, "I just confirmed in the air, and the beam of light you created was so faint that it was impossible to see with the naked eye after being reflected by the seventy-third mirror......"

"It decays so fast?!" Glenn's face was pale, if the light could penetrate three or four hundred mirrors, then I am afraid there was a way to make up for it, as long as a few more wizards cast spells together to create a more powerful beam.

But these are seventy-three mirrors, and they have only covered a fourteenth of the distance, and with such an attenuation frequency, they have to increase the beam by a factor of ten or even a hundred?

How is this possible?

"Master Lynn, I think you know what's going on, right?" Raphael turned to look at Lynn and asked.

Everyone present focused their eyes on the magic star, and suddenly remembered Lynn's evaluation of this experiment just now.

It's possible, but it's not feasible......

Lynn wasn't selling it at this time, and explained it. "It is possible to make light travel farther through the principle of reflection, but although the mirror can reflect the light, it cannot be completely reflected, and a part of the energy must be lost every time......

"That means you should reduce the number of mirrors and increase the distance of each reflection?" A wizard quickly came up with a solution.

"No, it won't work." Glenn said with a sigh. "Light can't travel too far."

He had already tried this, so he reduced the distance between the two mirrors to about 100 meters.

"That's because the elements present in the air also reflect and absorb light, and the light itself doesn't travel in parallel, but spreads in all directions, so we can see the light......," Lynn continued.

In other words, as long as the light can be seen, it means that the light is dispersed and reflected into their eyes...... Raphael immediately understood what Lynn meant, only then suddenly retorted.

"Shouldn't that be right, how did the sun's rays travel thousands of kilometers to reach this eternal star?"

After Raphael's reminder, many wizards have also discovered the 'loophole' in Lynn's words, if the light is constantly decaying, then the light from the sun cannot reach here!

The wizards of the School of Prophecy have calculated the distance between the Eternal Star and the Sun, and that is a very staggering number, even the nearest point is hundreds of millions of kilometers away!

"Outside of our planet, in the vast universe, the content of elements is very rare, and light does not lose energy in a vacuum, as for arriving on this planet, it is only scattered and absorbed by the elements, and it is not missing...... Lynn shook his head and said.

Lynn's answer dispelled everyone's doubts, but the successive problems made Glenn and the others completely stunned.

Wouldn't it be impossible to solve the problem of the intensity of the light attenuating with distance, Glenn pondered for a while, but he couldn't think of how to make the light pass a distance of a hundred kilometers and still be seen by them......

Could it be that you can only declare failure?

Glenn was very unwilling, he made so many preparations and put on such a big formation, but the result was still in vain......

It is conceivable that they will surely become the laughing stock of wizards tomorrow in their idle chatter.

At this moment, a voice like a bell suddenly rang in everyone's ears. "Wouldn't it be better to let these obstructive elements disappear and create a large enough vacuum field to simulate the environment of the universe?"

Everyone present looked in the direction where the voice came from, and then they found that several legendary speakers were walking towards this side, and the person who spoke was Harrov!

"Lord Harrov!" Glenn was pleasantly surprised.

That's right, as long as you create a vacuum field that covers the distance traveled by the light, you can greatly reduce the reduction of the light intensity.

Only a legendary wizard like Haroff could come up with this outrageous but effective solution!

After Haroff spoke, the wizards gathered nearby also offered advice to Glenn.

For example, a thousand mirrors is so much that they could have increased the distance of each reflection by a kilometer, so that only a hundred mirrors would be needed!

Even Anthony stepped forward, he was very interested in this specular speed of light experiment, and even offered to use thunder magic to create a more powerful light source......

In the midst of everyone's gossip, one problem after another was solved one after another, and such an eager atmosphere of magic research also made Lynn feel very comfortable.

Although there is no shortage of people on the field who are watching the excitement and even waiting to see the jokes, there are also many wizards who concentrate on magic research and want to figure out how fast the speed of light is.

Glenn also reinvigorated himself, changing the position and angle of each mirror on the drawing, reducing the number to a hundred, and preparing to experiment again with the help of more powerful light!

"If you have nothing to do, let's stay away, and all the great wizards will stay!" Harrov said solemnly, such a wide range of exclusion elements, even if he is a legend, he can't do it, he must gather the strength of everyone.

It took another hour to complete the preparations.

Anthony took the lead, and the flickering thunder began to appear in his palm, and it became brighter and brighter, and the violent thunder continued to jump, and both civilians and wizards squinted their eyes, and the light was so bright that it was impossible to look at it directly......

"Let's get started!" Harrov accentuated his tone, and the sound reached every corner of the city.

At the same time, the twenty great wizards and three legends cast spells together, and the surging elements around them were quickly repelled under the action of huge magic power, and in just three seconds, the vacuum field covering half of the city was quietly formed!

"It's really a big deal......," Lynn said with emotion, the wizards' brains and practical abilities far exceeded his expectations, but he quickly reined in his mind and raised his hand to expand his own realm, completing the part of the vacuum that he was responsible for.