The Primordial Wizard

In the study room of the central tower, Ace wrote slowly.

"... From this we can see that gravity and acceleration are the same thing. A person in free fall cannot feel his own weight because a new gravitational field appears in his acceleration system at the same time. This gravitational field and acceleration system cancel each other out.

This leads to our first axiom, the principle of equivalence.

The dynamic effects of the inertial force field and the gravitational field are locally indistinguishable.

Now, let's discuss the problem just now. If we try to define the inertial frame, we will fall into an endless loop. The equivalence principle cannot solve this problem. Then we can expand this concept, remove the inertial frame, and change it to all reference frames, no matter Whether it is inertial or non-inertial.

This is the principle of general relativity. All coordinate systems (including non-inertial systems) are equal, that is, objective and real physical laws should be valid in any coordinate system. Therefore, the laws of physics should be covariant under any coordinate transformation, so the principle of generalized relativity is also called the principle of generalized covariance.

Generalized covariance has physical content only through the equivalence principle. "

After that, Ace began to write a series of mathematical derivations and covariant equations, which will not be repeated here.

"Let's do another thought experiment. A closed elevator is accelerating upwards. A beam of light enters from a small hole on one side. What is the distance between the light and the floor when it reaches the opposite side?

According to the equivalence principle, we can deduce that the distance between the light point on the other side and the floor must be slightly smaller than that on the first side.

This is because the gravitational field bends light, in other words, light bends as it passes through the gravitational field.

So we need to discuss why light bends. "

The power of Dayuan is surging wildly, it seems that Ace raised some incredible question, even in the man-made demiplane, the source power flows into this world along the magic net, and surrounds Ace.

As the current second landlord in the inner world, Ace has a lot of authority. He eliminates the vision of Yuanli, retains only the pure Yuanli, and continues to write.

"Our cognitive geometry tells us that the straight line between two points is the shortest, and when a person wants to go from point A to point B, the straight line saves the most effort.

However, if someone wants to fly from Luminous City to Bayne City in the Old Continent, the shortest distance is not a straight line, but an arc formed around the surface of the earth's core.

This arc is also called a geodesic.

Geodesics are derived from geocentric measurements and represent the shortest path between two points.

Then, the light bending is also determined by some geodesic-like structure in the gravitational field.

In other words, the gravitational field changes space-time so that it becomes curved from flat.

We need to establish a new space-time equation and find out the law of space-time curvature. "

Ace stopped, time and space seemed to be vibrating, Dayuan was jubilant, and the Dayuan that had just been pressed was boiling again eagerly, like the prelude to the climax of music, one wave after another.

In the galaxy universe inside Dreamstar, a group of wizards have arrived at the Magic Temple, stepping on the cold silver star sand floor, Thales could not help but shudder, the melodious and empty music sounded, and everyone present felt the throbbing of the soul .

"Master Ace made this song, every time I come in, I feel trembling all over."

A legendary wizard whispered to his companions.

"There are a lot of details here. The music in the Magic Temple is different for everyone. This is music from the field of music. It hits your heart directly. The player is the music Oneiroi among the three thousand Oneiroi."

Another epic wizard seemed to know a lot and said with a smile.

"Quiet, this is the temple of magic, which contains the subconsciousness of all wizards. We are about to go to the sea of ​​consciousness in the temple. You must keep your minds steady. Once you are intoxicated by the sea of ​​consciousness, you will be assimilated and no one can save you." You are gone."

Bayern sternly interrupted everyone's whispering, and solemnly warned.

The legendary wizard and the epic wizard were immediately afraid to speak, and the wizard who came for the first time was even more anxious.

Betty coughed lightly, and said gently to the wizards: "Your Excellency Bayern is right, the subconscious sea of ​​wizards is indeed dangerous. Of course, there are souls stable above the third level. As long as you don't think too much, there will be no major problems." .

Don't try to comprehend the sea of ​​consciousness. If you become a mythical wizard, you can come here to comprehend and indulge at any time. "

"Lord Betty is so gentle, I really like her."

A newly promoted female legendary wizard put her hands together and said intoxicatedly.

"..."

The other wizard wanted to speak, but hesitated for a long time. He recalled the scene of seeing Betty transformed into a steel giant and easily defeated the three devil monarchs with extremely powerful electromagnetic rail guns and small tactical nuclear fission spells. He shuddered. Did not say.

Bayern bowed slightly to the statue of Ace, and then chanted the spell solemnly in magic language, the sound of gurgling water began to appear in the hall, more and more, and finally turned into raging waves, everyone was caught by the waves Scroll, feeling dizzy, and when I woke up, I found that I had left the hall and came to an ocean.

The sea water here is extremely clear and cheerful, and the wizards followed Bayern, swimming slowly in the sea.

A ray of colored light drifted past and hit a legendary wizard. He froze instantly, as if sinking into a dream, and seemed to be reincarnated.

It seems that he became a commoner, living in a cold city, being bullied from time to time, until one day he got a magic book, which changed his fate.

He tricked those who bullied him with the secondary spells he learned, and gradually became rich, but the good times didn't last long, and the city-state seemed to find that devil believers were being caught everywhere.

When he was in panic, the fireman appeared and led them away on the eve of the city's destruction, climbing over the snow-capped mountains and crossing the ice field.

A new city was built, a city of magic.

Master Ace uttered the strongest voice of the times, "The wizard with thinking power is the measure of all things."

He followed hard, eager to witness the future of magic, the beautiful future described by Lord Ace.

But he fell down and died in the night when a large number of monsters attacked the city, and never woke up again.

The legendary wizard suddenly woke up at this time, his eyes were blurred with tears, and he murmured: "The future you want to see has arrived. Now is the era of magic, the era of wizards, and the magic net dominates the inside of the world. We wizards It can capture hostile gods, put them into a long sleep, and develop a great magic civilization in the floating city. This is an era of bright and prosperous magic."

Feelings of comfort and regret surged, and the colorful light surrounded the legendary wizard and turned into a mark, sinking into the back of his left hand.