Experiments using mithianite were started.

"Speaking of vibrations, sound waves, light waves, and electromagnetic waves are the most common. First, let's try to generate high-frequency electromagnetic waves as orthodoxly as possible.

Jin wrote the necessary magic formula in the main magi crystal (magi formula), and attached a mithianite as an amplification device to the generating part.

"That's it."

Since he could not conduct experiments inside the workshop, he decided to go outside. It was 9:00 p.m. and pitch-dark.

"Father, please don't take it too hard. Whether this succeeds or not, please go to sleep today.

Finally, Reiko pleaded with Jin.

"...... I know, but I'm the only one who can do it now. But now is the time to do what only I can do. Please understand, Reiko."

"...... yes. I will help you as much as I can.

Jin's determination was so firm that Reiko had no choice but to give in.

"Okay, let's start the test. You monitor the situation.

"Yes, father."

<

At Jin's instruction, Reiko activated the prototype in her hand and the old man started to observe the test situation.

"Electromagnetic wave, firing."

The test is conducted in the sky with the operation time limited to 0.1 second in order to reduce the risk.

"Fire!"

Instantly, the blue-white beam disappeared into the void.

"What was that ......?"

Normal electromagnetic waves would be invisible to the eye. The old man answered.

"I see."

This would be a good application as a weapon, but it is not what we are aiming for now.

"This is not the way to use it, ......?

Jin decides to try the next idea.

"Father, what is it?

"The one I just tried was a transverse wave, but this time it's a longitudinal wave."

It's called a dense wave, and sound waves are it.

When free magic element (ether) is vibrated instead of air, it becomes a free magic element (ether) wave, and magic waves are included in this wave.

However, ordinary free ether waves are transverse waves, not dense waves.

Jin is wondering if it is possible to make free-magic elements (ether) vibrate like sound waves.

>

The old man seems to have no idea.

Jin gave an explanation to the old man as a way of verifying his own idea.

"First of all, the first step was the .

We know empirically that the space vibrates at that time, and we asked No. 700672 to measure the reaction speed of the . When we asked the 700672 to measure the reaction rate of the , we used it as the epicenter.

"But it is too uncontrollable."

<

"But... I have been trying to figure out why < causes space to vibrate, even if only slightly. ......<, I think."

<>

Harmonics are frequency components that are integer multiples of a wave with a certain frequency component. In music, they are called harmonics.

The original frequency is called fundamental wave, and if the frequency is twice as high as the fundamental wave, it is called the second harmonic wave, and if the frequency is n times higher, it is called the nth harmonic wave.

Jin was desperately trying to remember what he had learned in high school physics.

"Fourier something," the teacher said. ......

Although this was something he had learned at the college level, Jin's high school teacher had occasionally brought up such topics in order to get the students interested in mathematics.

One of them explained that a sine wave with different frequencies can be superimposed to form a square wave.

<>.

Jin recalls that he said ....... He did not remember the ***** part, by the way.

In fact, as you superimpose harmonics in Fourier <>, the sine wave gradually approaches a square wave.

In other words, the square wave contains harmonics.

In reality, devices that handle square waves need to devise ways to suppress the effects of external noise.

Let me digress.

By mobilizing all this qualitative knowledge, Jin is wondering if it is possible to create ultra-high frequencies.

"I think the reason why <> can vibrate space is because square waves are mixed in the waveform of the explosion.

<

"Father, how exactly do you do that with a square wave in a sparse wave?"

The old man agreed and Reiko asked for a concrete example.

"I'm thinking of using a force field generator."

The force field generator radiates a force similar to that of a gravitational wave.

"If we reverse the polarity in a short period of time, it will become a sparse wave, right?"

<

The idea is to repeat <> and alternately.

"I was thinking that if we could control this in a square wave manner, perhaps the space could be shaken."

I understand, father.

>

"You could say that."

Controlling square-wave-like oscillations requires a fairly large output power. For this, Jin used mithianite.

"There we go."

At 10:00 p.m., the second prototype was completed.

"Okay, let's test it."

As before, this was done outside. Once again, Reiko picked up the prototype and activated it.

"It works!"

This time, it seemed to take less than a second to reach a stable square wave.

"Oh?

For a moment, in the darkness of the night, I thought I saw something .......

Then, after a second, the movement stopped.

"My old man, what was that?

<

It seemed to be similar to, but completely different from, the magic circle or magic formula that sometimes appears when magic is exercised.

<

"You think so, don't you?"

"Yes, I think so.

I am sorry to say, but the difference cannot be made up overnight.

"Oh well. ...... free magic element (ether) luminescence, so can we expect a little?"

<<< I don't know. Free ether luminescence can be seen in many cases.

When an ether converter converts a large amount of free magical element (ether) into magical element (mana), the surplus free magical element (ether) or magical element (mana) may emit light.

"But I think I can do something along these lines. We have to try as much as we can.

Although he still cannot vibrate space intentionally, Jin thinks he may have at least found a clue.