Chu Fei began to let go of his thoughts: First it is the Wind Blade, then the Flame Blade, will there be water and earth spells next?

But as Chen Wenxin explained, Chu Fei sighed quietly - he was thinking too much.

In the world of technology, there are no wind elements, water elements, fire elements, earth elements, only atoms, electrons, light, magnetic fields, etc.

Therefore, the so-called "Blade of Flame" should be more precisely called "Blade of Plasma".

Chen Wenxin first popularized the concept of "flame" to everyone.

What is a flame?

Flame is a phenomenon, a chemical reaction, and a physical phenomenon that accompanies it.

Flame is also a gradient field of energy, with only a very small part of the outer periphery, and can reach the plasma state.

Because flame is a ‘phenomenon’, not a ‘matter’, the flame cannot be stored.

The so-called "flame blade" means continuing to stimulate the "wind blade" to its limit, breaking the physical balance (critical value), and converting it into a high-temperature plasma state, which looks like a flame burning.

In fact, this is a supercritical wind blade, which can be called: the thunderous wind blade.

So, how to stimulate the wind blade to a supercritical state?

Chen Wenxin pointed to a dynamic picture and talked freely:

"The essence of the wind blade is ultrasonic waves and ultrasonic knives. As the frequency increases, the power will continue to increase.

But the frequency of air cannot be increased infinitely, it has physical limits.

The transmission of sound waves is a three-dimensional structure, similar to an onion structure.

The air density at its peak position is high, and the air density at its trough position is low.

As the sound intensity increases, the peak air density will become larger and the trough air density will become smaller and smaller.

So you can see that there is a limit here.

When the air density in the trough is infinitely close to the vacuum, the sound wave will be converted into shock waves.

This biggest sound, we call it the 'threshold'."

"At standard atmospheric pressure, approximately 0.1 megapas, the threshold is about 194 decibels.

At this time, the sound will be transformed into a shock wave. The shock wave is not limited by the speed of sound, and the air will also exhibit liquid characteristics.

However, one thing to note is that the threshold is different depending on the air pressure and the air density are different. You can ask the physics teacher for this.”

"The sonic boom in normal supersonic flight is a manifestation of breaking through the threshold. The sonic boom is essentially a shock wave.

And the flame blade we want to learn is derived from here.

When the wind blade is compressed to the limit, compressed to the critical state and breaks through, it will show a plasma state, and the external phenomenon is flame.

At this time, the temperature of the 'Blade of Flame' can reach hundreds of degrees Celsius, or even higher."

While speaking, a wind blade appeared in Chen Wenxin's hand, light green.

But as Chen Wenxin continued to exert force, the wind blade trembled violently, and a terrifying hissing sound appeared in the air.

Then I saw the wind blade starting to appear slightly red, light red, and bright red. As the temperature continued to increase, it began to appear orange, yellow, incandescent, and light blue, and finally "perfect".

While changing, the temperature is also displayed on the large screen behind it. The "Wind Blade" continues to increase from the room temperature and finally rises to 3218℃.

"This is the Blade of Flame. This is the temperature I can reach at present, more than 3,200 degrees, and can already gasify steel."

Chu Fei looked at Chen Wenxin's Feng Blade in a daze, leaving only endless surprise in his heart.

After Chen Wenxin introduced the concept, he finally began to explain the data model of the Flame Blade, as well as the mathematical formulas, physical formulas, etc. that need to be used.

A small flame blade requires calculating the fluid, calculating the air criticality, calculating the altitude and air pressure, calculating the interference of different atmospheric components on the results, etc.

After that, it was full of various calculation formulas and complex data for more than an hour.

In the end, there were as many as 12 light curtains floating on the podium.

Chu Fei was so focused on listening. However, most of the students looked at the sky.

What are you talking about? You know every number, character, and symbol. But you don’t know what to say when you put it together.

And it is understandable to calculate atmospheric pressure, but why do you still need to calculate the rotation of the planet and the gravity of the planet? Is this the rhythm of cultivating snipers?

God, the earth, the path to monks is too difficult; the academic master is already fainting in the toilet.

As a result, after Chen Wenxin finished his lecture, there were less than 30 students who insisted on listening to the lecture. Most of them were as steep as mountains and rivers.

Only Chu Fei and Yang Xiaozhu fully understood.

Chen Wenxin finished speaking and it was less than 10 minutes before the end of get out of class. He fixed the light curtain and said, "Let's stay here until tomorrow night."

I will go back tonight and think about it carefully. If you don’t understand, I will talk about it tomorrow.

get out of class is over, and anyone who wants to leave can leave.

Chu Fei, Yang Xiaozhu, you two come here. We will conduct practical training tonight. Go to the playground."

Yang Xiaozhu exclaimed softly, with a faint surprise in her voice, "Teacher, do we want to fight in the real world?"

Chen Wenxin nodded.

The students next to them became curious and some people asked if they could watch it.

Chen Wenxin shook his head, "No onlookers. The battle of spells is very dangerous."

Huang Haifeng was dissatisfied, "How dangerous can it be!"

Chen Wenxin sneered, "It's not very dangerous. Since some students lost control of their magic and swept dozens of people in one breath, they are no longer allowed to watch casually. Those who do not listen to advice and watch strongly will bear the consequences."

Huang Haifeng opened his mouth and finally giggled, "There is still something tonight, teacher, see you tomorrow."

After a while, Chen Wenxin, Chu Fei and Yang Xiaozhu were in their seats on the school playground.

The live camera floats in the air; there is a light curtain spreading next to it.

The playground is brightly lit, almost achieving the shadowless light effect, illuminating everything.

Yang Xiaozhu looked at the floating camera and asked curiously, "Teacher, how many people are there on the live broadcast platform now?"

"It has exceeded one million!" Chen Wenxin smiled brilliantly, "Influenced by you, many students from the enlightenment classes have opened live broadcast rooms for their studies, and there are even some teachers and experts here to impart knowledge."

"Disse knowledge?" Chu Fei's eyes lit up. Thinking of the gains he had when discussing with his classmates, he was immediately ready to move.

By the way, if you discuss issues with millions of fans, how much will it gain?

Chu Fei was still thinking about it, and Chen Wenxin spoke, "Chu Fei, Xiao Zhu, have you learned the Blade of Flame?"

Yang Xiaozhu frowned slightly, "I feel like I understand. I'll try it first."

Yang Xiaozhu just started to try, and Chu Fei had condensed a light green wind blade and began to improve.

“Buzz…”

Amid the sound of the sound, the wind blade began to turn red slowly but firmly.

The live broadcast camera comes with a temperature probe to start recording the temperature.

With the attention of fans, Chu Fei only took five minutes to activate the wind blade into the flame blade, and the final test temperature reached 722℃.

Chen Wenxin looked at Chu Fei in amazement and waved, "Come on, fight. Note that the virtual environment of the real world and the Kingdom of God are still a bit different.
Chapter completed!