�Gasp! Gasp!�

With all my strength, I held out for 3 minutes and 20 seconds, and I had to extend this time to 10 minutes in the next 15 days.After measuring the record, I always took 20 minutes off.It was a training that could put your life at risk if you neglect your rest.

Sitting down, Shirone paid attention to the noise from the next room.Ned seemed to have entered the welding process.I decided to take a break to look at the situation there.When I opened the door of the next room, Ned was buried in all kinds of parts.

�Hey, are you here?�How long is the output time?�

�Well, I�ve increased it by twenty seconds.What about you?�

�As you can see, I�m still working on the engine.�

�Can you make it on time?�

�Don�t worry, I�ll have to guess.Originally, prototypes take time.It�s hard to correct errors in the production process.That�s why I�m taking the time to be meticulously.

�I see. By the way, what happened to what Iruki said?�

�Oh, that one? I got it yesterday.This one.�

Ned threw a finger-thick rope at Sirone�s feet.The outer shell was made of rubber, and a quartz-like transparent membrane penetrated the interior.It was a special request from Iruki to his father, who was the head of the mine.

Since 300 holographic devices were scheduled to be installed at the elementary elements of the school, it was impossible for Sirone to test photon output on all devices alone.

At first Ned remembered the mirror.It was a method of transmitting the photon output to the mechanical device using the total reflection property of light when the syrone initiates the photon output.However, there were too many sections where light had to bend to realize it as a reality.

Ned wondered what it would be like if there were much more mirrors.It has been concluded that creating a tunnel through which light passes by attaching a mirror to a small hose can have the effect of bending light like differentiating a straight line.

Ned proudly announced the fact.He added that if he could make it, he would sit on a pile of money from that day on.

But Iruki broke the ice.My father�s letter, which arrives every month, contains various issues of magic society, because the same thing that Ned said was already introduced in his letter a few months ago.The name was �optical fiber.�

I couldn�t describe Ned�s disappointment.Even the ivory tower, which runs on the cutting edge of magic, was a field that had just been developed, so even Iruki felt sorry for it.

But when he received the goods and analyzed them, Ned shook his head.Engineering technologies that were so delicate that they could never be made at their current level were accumulated.

�But you had the same idea as the ivory tower,�Ned is really something, too.�

Shironet took the fiber-optic and examined it closely.I couldn�t tell what was great by looking at it.

�But I managed to save it.�

After the welding, Ned stood up rubbing his red eyes.

�Even the ivory tower is in its early stages, so you can�t expect its performance.Let�s give a demonstration first.There�s something I�ve made a tester for.�

Ned handed over the modified fiber to Shirone.Unlike what was shown earlier, there was a transparent bead at the end.

�What should I do with this?�

�Just grab it and start the photon output.I�ll calculate the efficiency, so try it now.Instead, you have to pour it all out.It�s important to measure the maximum.�

Shironet grabbed the crystal ball and started the photon output.The break time was over anyway, so there was nothing rough.A light source was formed in his hand, and the crystal ball shone palely.The needle began to shake in Ned�s device connected to the optical fiber.Ned, who had been watching the instrument panel until three minutes past the output limit, said in a sullen voice.

�Oh, you�re right, Iruki is right.This is an early development.Well, should I thank you for this?�

�Is it that bad?�

�It�s only 18 percent efficient.I mean, only 18 percent of the light you send will reach your destination.� JrNovels.com