Gradually, Li Tian entered a meditative state······

This meditation is different from the previous ones, this meditation is pure memory, not the meditation that is said during the practice.

At first, Li Tian's memories were just bits and pieces of the flat world, then the bits and pieces of the Sumeru world, and finally he returned to his own world: Shenzhen, where there were Wang Cao and Lin Qian, then Leshan, Yan Hong, and Li Jian, and then a deep mountain and old forest, Master Geng Qiu, and the Zongmen's Zangjing Pavilion.

Seeing the Scripture Pavilion in his memory, Li Tian's mind couldn't help but move, but with such a move, he seemed to have entered a room. This room was exactly the same as the scripture pavilion in his memory. The excited Li Tian seemed to have returned to the previous time, running around happily.

Although Li Tian didn't know why the scene here was so real, he knew that these were his meditations, not real, they were just his memories. So, Li Tian quickly became normal, eagerly looking for the answers he needed.

It feels very strange that here, Li Tian doesn't have to run to the book to get it as usual, but as long as he has an idea, the book he wants to read will take the initiative to fly in front of him. And you don't have to flip through it yourself, the classics will open automatically, and if you want to jump to view it, or flip back and re-read it, the classics will follow your thoughts.

Li Tian, who was impressed by the wonder here, had not been here for a long time, and found the answer he needed, so he had to walk out of this room. But as soon as I walked out of this door, there was a door with a very strange sign in front of me, this door can't be said to be made of material, it should be leather, right?

Curious, he wanted to touch the door with his hand, but just as his hand touched it, the leather door opened automatically.

Everything that came into view stunned Li Tian! Behind this door, there was clearly a void, and there was nothing. Just when Li Tianhu was suspicious, a humanoid red light floated in front of him, and then it passed away, and then, three strange-looking demon beasts also passed by, and then, one after another, dots of light of different colors, like meteors······

"Bang!"

There was a roar, as if something had exploded, and Li Tian was shaken out of the room by the aftermath of the explosion. Affected by the aftermath of the explosion, Li Tian only felt that he had been shocked and flew far away, and his head was a little dizzy·······

"Li Jiale!"

He covered his head and looked up, and Li Tian felt trembling all over, and scolded in his heart: "Damn! Why is this guy? How could I meditate on this old monster?

What hit Li Tian's head just now was the textbook in the hand of this person named 'Li Jiale'. And this person is Zhao Pengju, Li Tian's physics teacher in junior high school.

At this time, Li Tian seemed to have returned to the classroom in junior high school, and he felt that he was on his own body and on himself who was in junior high school. The warm name, the familiar scene, and the good mood were all ruined by this 'demon' physics teacher. In Li Tian's memory, his head didn't know how many times he had smashed this guy.

At this time, Li Tian, who was attached to himself when he was in junior high school and was still called 'Li Jiale', covered his head with his hands while viciously looking at the back of the physics teacher who was slowly moving away.

After waking up the sleeping Li Jiale, Zhao Pengju took the textbook and continued to explain the content of the lesson according to his own lesson plan as he walked: "In the next class, we will have an experimental class: through the phenomenon of 'triboelectric electricity', we will study and understand that the same kind of charge repels each other and the opposite charge attracts each other; through experiments, we will understand the magnetic field and know the geomagnetic field······!"

The original lullaby, like a hammer, smashed into Li Tian's mind, and there was a loud sound: "Magnetic field, geomagnetic field? Isn't this exactly what I urgently need to know now?"

Just now, Zhao Pengju woke up with a textbook, and 'Li Jiale', who was still in a daze and full of resentment, immediately became energetic and listened attentively to the physics class that he originally hated.

"Electromagnetic waves are a form of motion in an electromagnetic field. Electricity and magnetism can be said to be two sides of the same body, the current will produce a magnetic field, and the changing magnetic field will produce an electric current; the changing electric field and the changing magnetic field constitute an inseparable unified field, which is the electromagnetic field; and the propagation of the changing electromagnetic field in space forms an electromagnetic wave, and the electromagnetic change is like a breeze blowing on the water surface to produce water waves, so it is called electromagnetic waves, also often called radio waves······

"Jingle Bell ·····"

A boring physics class ended quickly. The knowledge of this lesson is far from satisfying Li Tian's current needs. But this is just a memory from a physics class when Li Tian lived in junior high school, what can he do?

Search, extract all your memories about physics. With the targeting, Li Tian made the memory palace located at the highest point of his Zhihai Desert Island even more shining.

An imperceptible existence, rapidly consuming a large amount of cognitive energy, transmitted Li Tian's knowledge of physics in the memory palace to Li Tian, who was far away in the sub-plane world.

"Hurry! Hurry up and notify the third master to come over!" Li Lingzhen, who had been staying in Li Tianzhihai, saw the three-story small attic with a simple structure, constantly flashing with fine light, accompanied by a large amount of loss of consciousness. Sensing that something was wrong, he immediately ordered his own servant soul around him to quickly inform Li San, let him preside over the overall situation, send more manpower, and provide more power for the master.

Now Li Tian finally understands: why when he was in junior high school, physics was always one or twenty points. Dare to love that I have no memory of physics knowledge except for the memory of sleeping in physics class.

What to do?

Li Tian, who was eager, looked at Zhao Pengju, the physics teacher who had already finished class and was about to walk out of the classroom. Suddenly, there was a feeling that I wanted to swallow him in one bite, a feeling of inspiration.

Immediately, Li Tian, who was attached to the body of 'Li Jiale', felt that he suddenly flew out of this body, and felt that he had become a monster with a sheep's body and a human face, and after a few baby cries, the monster the size of a Peking dog, with a big mouth infinitely back, actually swallowed his body, leaving only a circle, and returned to the original place, two rows of teeth that touched up and down, and then swallowed Zhao Pengju, who was many times bigger than himself. Then the two rows of teeth were flipped again and returned to their original places, and the big sheep body of Jingba was gradually revealed.

"A changing magnetic field can excite a vortex electric field, and similarly, a changing electric field can excite a vortex magnetic field. The transmission characteristics of electromagnetic fields range from static to dynamic, from unbounded to bounded, from passive to active, static fields, time-varying electromagnetic fields, plane electromagnetic waves, conductive electromagnetic waves, electromagnetic wave radiation, and so on.

Electromagnetic wave is an oscillating particle wave derived from the electric field and magnetic field that are in phase and perpendicular to each other in space, and is an electromagnetic field propagating in the form of waves, which has wave-particle duality.

The direction of the electric field, the direction of the magnetic field, and the direction of propagation accompanied by electromagnetic waves are perpendicular to each other, so electromagnetic waves are transverse waves. When its energy step jumps past the critical point of radiation, it radiates outward in the form of light, and the wave body is photon at this stage, and sunlight is a visible radiation form of electromagnetic waves, which does not rely on the medium to propagate, and the propagation speed in the vacuum is equal to the speed of light.

Electromagnetic waves (including light) propagate from one homogeneous isotropic medium to the demarcation plane with another homogeneous isotropic medium, and propagate into two mediums, with the first medium propagating the reflected wave and the second medium propagating the refracted wave. The intensity and phase of the reflection and refraction of the electromagnetic wave are determined by the boundary conditions of the electromagnetic field at the interface.

Phenomena of planar electromagnetic waves at the interface of media······"

"Plane electromagnetic waves?" A piece of information about magnetic fields and electromagnetism poured into Li Tian's brain, and many things that he couldn't figure out gradually became clear.

Looking at the electric and flashing circular electric fields created by himself in front of him, Li Tian couldn't help but think: "'A changing electric field can excite a vortex magnetic field,' then, in an extremely irregular changing electric field, it should trigger a 'magnetic storm,' right? But this is a flat world! Will there be a 'magnetic storm phenomenon' in a three-dimensional world?"

The 'magnetic storm' that Li Tian was expecting did not happen, but he found a more valuable phenomenon. Some of these electric fields will repel each other and always maintain a certain distance, while others will attract each other and become a larger electric field, bigger and bigger.

Could this be the reason why this area has become larger? Li Tian once again felt the power of knowledge!

As a result, Li Tian was no longer obsessed with studying any techniques, but began to focus on some very small phenomena: How did this electric and flashing circular electric field come about? Under the subtlety of his divine sense, Li Tian soon discovered that the electric fields of each electric flash were formed by the magnetic field bands emitted by his own magnetic field, and the magnetic field formed was constantly changing.

An electric field is a field that exists around a stationary charge, while a magnetic field is a field that exists around a moving charge. An electric field will exert a force on any charge placed in it, while a magnetic field will only exert a force on a moving charge. The direction of the field strength of the electric field is open, from the positive charge to the negative charge, and the tangent of the electric field line at any point above it can be placed, and the direction of the field strength of the magnetic field is the closed curve, and the tangent direction of any point above it is the direction of the field strength of that point.

In other words, the trajectory of the electric field is random and can be controlled, while the trajectory of the magnetic field cannot be controlled.

Now Li Tian has completely understood: this flat world that traps himself is itself a natural huge magnetic field.