"There are only fifty mirrors left. Place them according to the blueprint. The angles cannot be wrong at all!"

Glenn loudly instructed Nancy and others to put the mirrors in the appropriate places and adjust the angles according to his precise calculations.

Thanks to the wizard's steady hands and high precision, if the angle was fifteen degrees, it would never be sixteen degrees, otherwise it would not be easy to connect the reflected light from hundreds of mirrors.

Just to calculate the various angles of refraction, it took the seven wizards a whole day!

What made Green feel a little relieved was that the process of borrowing the mirror was very smooth. After knowing that it would be used for the speed of light measurement experiment, many curious wizards generously contributed the round mirrors they had bought before.

He even got permission from the council to use Greenridge's streets and squares for his experiments when the sun went down and the shops closed.

It took Glenn and his team more than an hour to place the last fifty mirrors. By the time they finished, the sun had set and the entire city of Greenrill was in darkness.

At his request, there were no candles in any of the houses, and everyone could only see the things around them with the help of a little moonlight.

"Glenn, can you speak now? Why do you want to borrow so many mirrors from us? Are you planning to use this to measure the speed of light?" A wizard who was familiar with Green asked impatiently.

Everyone present also had an expectant expression. Due to the temptation brought by the Silver Moon Medal, there were many wizards who wanted to complete this experiment. There were all kinds of ideas, but Glenn was the first one to put his ideas into action! Facing the gazes of the crowd, Glenn also seemed a little nervous, but he still explained it incessantly. "My plan is to use the principle that mirrors can reflect light to increase the distance traveled by light, so as to measure the speed of light..."

He placed a large number of mirrors in Greenrail City, and in a moment, he would create a beam of strong light that would be reflected from the entrance of the DC area to the XC area, then to the South City area, and then return in a circle...

"It requires a total of one thousand reflections and a total distance of one hundred kilometers!" Glenn said proudly.

He had calculated every point where the mirrors were placed, which meant that they only needed to stand there and wait for the light to circle around Greenrail City, and the final landing point would be the tower above their heads! "I placed a piece of white cloth on the top of the tower. As long as you see a conspicuous light spot on it, it means that the light has returned once and traveled a hundred kilometers. The time it took can be used to calculate the speed of light..." Glenn explained.

"What a novel idea, it can be done this way..." Raphael suddenly realized and looked at the wizard named Glenn with admiration. In this way, only a few streets are needed to create a distance of 100 kilometers and conduct experiments under their noses.

The other wizards also immediately became interested. Glenn's plan sounded feasible. That was a full 100 kilometers. At least the light element would need to run for one or two seconds, right? "Dean Lin, do you think this can measure the speed of light?" Alok couldn't help but ask. He knew that the dean was also preparing for a related experiment recently, which would determine the ownership of a Silver Moon Medal.

"It's feasible, but it's also not feasible..." Lin En smiled and spoke mysteriously, with no intention of revealing the answer.

I have to say Glenn is quite creative. He even thought of this method, but he still lacks some considerations...

Seeing that Lin En's words were so ambiguous, the wizards on the field couldn't help but curl their lips. It seemed that even this magic star didn't know the result and could only use this excuse to save face.

Glenn did not argue with the crowd. He took the blueprint in his hand and checked it one last time. He took a deep breath and adjusted his state.

Time passed bit by bit, and when there were about three seconds left until midnight, Glenn raised his hand, and a scorching fireball appeared in the air, illuminating the entire street.

But this was just the beginning. Glenn and five other wizards cast a spell together. As the magic power surged, circles of reflective layers began to appear around the fireball, forming a closed sphere in mid-air, enveloping the fireball, leaving only a small hole with a diameter of one centimeter...

The light released by the entire fireball was gathered together and shot out through the small hole, aiming at the first circular mirror.

Glenn controlled the time extremely accurately. It was the moment when the magic clock reached zero. Under the attention of countless people, dazzling beams of light appeared in the entire street, and under the continuous reflection of the mirror, they stretched to the end of the field of vision.

Nancy stood with her back to Glenn, staring at the top of the tower, not daring to blink for fear of missing the light. She held a magic clock in her hand, and she had to stop it immediately the moment she saw the light. The final time was the time it took for light to travel one hundred kilometers.

One second... three seconds... five seconds... ten seconds...

Nancy stared so hard that her eyes were almost sore, but there was nothing on the white cloth on the tower, and no light appeared.

"It seems that the speed of light is not very fast... It's been more than ten seconds, why hasn't it arrived yet?" Alok muttered.

"That's a full 100 kilometers. Even if you run as fast as you can, it'll take you half a minute, right?" Pierce said with a smile.

Raphael and the others frowned, and a thought vaguely emerged in their minds: Could it be that something went wrong with the experiment? Thinking of this, several great wizards flew up directly, intending to look around the entire city from high in the sky to find out where the problem was.

Glenn below also noticed something was wrong, because the light intensity from the mirrors he saw was decreasing much faster than he expected...

About ten seconds later, Raphael and others returned from the air, and their expressions became somewhat helpless.

"Master Raphael, what's the situation? Is the light not here yet?" One of Glenn's good friends came forward and asked curiously.

(End of this chapter)