Reincarnation with AI (Unemployment-Free)

the next day.

Rudeus and Sylphie returned to the secret base.

They skillfully set up the dark room, adjusted the sunlight, and finally condensed a water sphere.

The halo of Buddha's light that I saw yesterday arrived as promised.

After a night of questioning, Rudius had learned that the light cone that formed the Buddha's light and the small tail light cone that gathered sunlight were not the same thing.

Although it appears to be a complete whole in terms of geometric position.

However, the relationship between them is "two sides of the same coin," with completely different geometric positions and physical causes.

Simply put, the light cone of Buddha's light can be considered as sunlight being reflected by a water sphere, thus becoming a light cone in the opposite direction to sunlight.

The small tail is a cone of light formed by refraction, so its direction is the same as that of sunlight.

"Hilfi, do you see this rainbow-colored light?" Rudeus said to Hilfi, pointing to the halo. "Look, the sunlight is being reflected back by the water sphere."

The facts are undeniable; Rudius was simply stating a phenomenon that anyone could observe.

"But why is there a rainbow around it?" Sylphie asked.

The problem is coming.

However, Rudius couldn't directly tell Silphi that this was because different colors of light have different wavelengths, resulting in different landing points after being reflected by the water sphere.

The result, as seen in the visual presentation, is a rainbow that appears as separate segments.

It's impossible to talk to Hilfi about wavelengths.

In the eyes of people in the Middle Ages, light came from God and from heaven.

Light is pure and flawless.

If light changes color, it's because it's been tainted by something else and has acquired a different color, not because the light originally contained that color.

This is the medieval explanation for the colored rays created when sunlight shines through the stained glass windows of a church.

Contrary to modern understanding, leaves are not green because they do not absorb green light, but instead reflect it into your eyes.

This was also the problem Newton faced at the time.

How can you prove that the light has not been defiled?

How can you prove that light wasn't stained a different color by other objects?

This kind of question is as difficult as the chicken-or-egg dilemma.

Based on the AI's answer, Rudius knew that Newton had used a convex lens to recombine the separated sunlight back into a beam of white light.

The irrefutable facts speak for themselves.

However, while Rudeus could use magic to create a floating water sphere that seemed absurd to modern people, he could not create a convex lens.

Before yesterday, Rudius had only considered experiments on separating light and had not thought about restoring the rainbow.

Therefore, instead of having the glass fired beforehand to make a triangular mirror, he chose a prop that looked more perfect at first glance: a floating water sphere.

Now that we have all the materials for the light-splitting experiment, let's start the experiment right away!

And so yesterday's experiment took place.

Rudeus is currently unable to control the water magic in his hands to transform it into a solid, stationary triangular mirror or convex lens; it's too difficult.

The water sphere can be formed because of the properties of water itself. That perfect sphere is formed spontaneously by water under the action of surface tension. Rudius was just holding it up.

For other shapes, Rudius simply couldn't make them completely still after they were shaped.

Please, this is water, water that seeps into everything!

"I don't know," Rudius replied.

What can we do?

Just say you don't know.

This is the best answer.

However, Rudius added, "But perhaps that's why rainbows form; after all, rainbows only appear after it has rained."

"Really! Rudy, you're so smart!" Hilfi clapped her hands in praise.

"But why is there only half of this rainbow?" Rudeus then asked.

"Hmm...it's strange."

Hilfi reached out and touched the Buddha's light with a puzzled expression.

Although a question has been raised, it is destined not to be resolved in the short term.

Rudius turned his attention to the little tail.

"Sylphie, look here, this place is amazing too!"

"Where? Where?"

Hilfi's attention was diverted to the small cone of light that Rudeus was pointing at.

Rudeus then took out a withered leaf and placed it at the focal point of the light cone.

Within seconds, wisps of white smoke rose from the focal point, and both of them smelled the burning leaves.

Hilfi stared wide-eyed as Rudeus moved the dead leaves aside.

The area where the fire was concentrated was completely charred, yet a small wisp of white smoke still continued to rise.

"Wow, that's amazing!" Shilufi exclaimed.

Looking at Sylphie's expression, Rudeus realized that the surprise she felt from the focused sunlight was no less than that from seeing the Buddha's light.

This is also an aspect of education that people in ancient times lacked compared to people in modern times.

Poor child, this is a magnifying glass game that modern people always play when they are young... Rudeus thought to himself.

Rudeus handed the leaf to Sylphie and said, "Sylphie, why don't you try it too?"

"Um."

Happily accepting the leaf, Hilfi placed it in the spotlight to roast.

After roasting for a while, take it out and examine it carefully, ask about the taste, and then continue roasting.

It looks like we can play for quite a while.

Rudius looked at the drifting smoke and thought of the Tyndall effect.

Somewhat counterintuitively, light is actually invisible.

The Tyndall effect makes light visible, allowing us to see the "light path," because dust scatters the light, and the scattered light is then seen by the human eye.

Otherwise, light is invisible unless it shines directly into a person's eyes.

The fact that light is visible under the Tyndall effect demonstrates that light itself is transparent.

The world we see is the result of light undergoing countless reflections before entering our eyes.

The light that a person sees is only the light that enters the person's eyes.

"Hilfi, look, after we put the smoke into the light, the light there became brighter," Rudeus reminded him.

"It really is!" Hilfi exclaimed in surprise, guiding the smoke from the leaf into the small cone of light. "Wow! This little tail is so bright!"

If smoke works, can steam work too?

Despite thinking this way, Rudius instinctively felt that things would be different, though he couldn't quite put his finger on why.

It's called steam, but it's actually countless tiny water droplets, countless miniature water spheres.

As for dust particles, it should be obvious that their physical form is solid.

The results obtained from solids and liquids will naturally be different.

As for the specific differences, Rudius had no idea.

Why not just give it a try?

Everything is already in my hands.

"Silphie, I'm going to try using steam to see what happens. Please step back a little," Rudeus reminded her.

"Okay, sure," Hilfi replied, stepping back a step.

Steam began to appear in Rudius's hands and continued to flow towards the water sphere.

Rudius immediately noticed something was wrong once the steam came into contact with the light.

The once clear beam of light appeared to have been blurred.

What was just a water sphere that looked like a crystal ball has transformed into a light bulb filled with a hazy glow after being enveloped in steam.

It looked a lot like the effect of light shining through frosted glass in a hotel.

The little white tail behind the water balloon became brighter and thicker.

Everything in Rudius’s view, while still maintaining its original shape, appeared to have gained some weight.

The blue of the Buddha's light became more vibrant; even in the white light area, the light seemed to have a thin layer of blue veil added.

As steam continued to pour in, other changes occurred inside the room.

When there is only dust, Rudeus cannot see the walls of the secret base; all he sees is a beam of white light against a dark background.

The contrast was extremely high back then; you couldn't even perceive the distant walls.

Now, with the addition of steam, Rudius can see the walls of the secret base.

The boundaries of the beam, the position of the focal line, and the outline of the light cone were all blurred.

Everything turned into a soft ball of light.

Is it volumetric fog? Or ambient lighting?

Rudius put his hand into the steam, which enveloped his hand in a soft halo, as if it were bathed in holy light.

"Rudy, your hands are so beautiful," Hilfi complimented.

Indeed, looking at his hands, Rudius felt that if he were to show off such a skill in a church, the people below would immediately kneel before him.

Rudius had expected to see a rainbow-like spectacle, since they were all just tiny water droplets.

But it seems I was overthinking it.

This looks about the same as the effect of turning on your car lights in heavy fog.

It's a very common phenomenon...

However, I have never observed this phenomenon so carefully before.

"Silphie, come into the fog," Rudeus said.

Hilfi stepped into the mist and asked softly, "Is that so?"

"Yes, Silphie, you look beautiful now, just like an angel," Rudeus praised.

"Oh my god! An angel!? How could this be? I'm not that good!" Hilfi covered her cheeks and said in a panic.

"No, it's true. Hilfi really looks like an angel now," Rudeus affirmed again.

"Hehehe, is...is that so?"

"Yeah, Sylphie is practically glowing."

Rudius continued to create fog to maintain the atmosphere.

So, this must be ambient lighting...

Seeing Sylphie enveloped in light made the trip worthwhile.

As steam continued to be injected, Rudius noticed that shimmering "snowflakes of light" began to slowly fall from the air.

Sylphie, shrouded in mist, appeared even more beautiful against the backdrop of these snowflakes.

"Wow, Rudy, look at this."

Hilufi was also attracted by the sparkling "snowflakes" in front of her and couldn't help but reach out to catch them.

"Is this snow, Rudy?" Hilfi asked.

"No, this is rain," Rudius replied definitively.

Rudius knew their identity almost the instant he saw these "snowflakes of light".

Those are tiny water droplets formed from dust particles that have been covered by a large amount of moisture.

After gathering into water droplets, they begin to settle under the influence of gravity.

Because they have just begun to settle, their movement is relatively slow, and when combined with sunlight, they create the effect of snowflakes.

Once you know the first step, reasoning out the rest is not complicated.

This is knowledge about the formation of rain that Rudius already knew in his previous life.

Furthermore, when releasing the water-level magic [Thunderous Rain Cloud], Rudeus reviewed it thoroughly through his discussion with the AI.

In nature, water vapor adheres to dust particles to form water droplets, which is the process by which rainwater is formed.

In modern times, that dust particle is called a condensation nucleus.

By the way, isn't the precipitation of crystals in a saturated solution the same as water vapor forming water droplets through condensation nuclei?

Rudius recalled that many experiments involved the addition of condensation nuclei, so he jotted down the question.

Seeing that Rudeus was taking notes, Hilfi didn't disturb him.

It wasn't until Rudius looked up and said, "Silphie, you still remember that steam is made of small water droplets, right?"

"Mm," Hilfi nodded slightly.

"These tiny water droplets, once they stick to the dust, accumulate and eventually turn into raindrops."

"Will it keep getting bigger?"

"It will get bigger, but it won't keep getting bigger."

Why?

The problem is simple in theory, but the detailed explanation is extremely complex.

It involves gravity, water surface tension, and air resistance.

Larger raindrops are more affected by gravity and therefore have a faster terminal velocity.

As a result, smaller raindrops are caught up by larger raindrops and then merge.

The larger raindrops, after merging, will break apart again into many smaller raindrops due to the dynamic pressure of the air overcoming the surface tension of the water.

In the continuous cycle of collision, merger, and breakup, these three elements interact in a complex dynamic equilibrium, thereby limiting the ultimate size of raindrops.

"Because the wind will blow the water away." Rudeus cupped his free hand and used water magic to condense some water within it, saying, "Like this."

After saying that, Rudius forcefully blew the water in his hand, creating a spray of water.

"Oh! Yes. It's like when you run, you can feel the wind. I understand now," Hilfi said, realizing the truth.

Rudius continued to look at the sinking "snowflakes".

If you keep adding steam, won't all the dust be "washed away"?

Rudius wanted to see what would happen without dust, so he increased the amount of steam being introduced.

Gradually, the clear path of light outlined by the dust disappeared.

The entire room was filled with a uniform, diffused, soft, faint blue mist.

The Buddha's light was no longer a clear, colorful fan-shaped field, but rather a blurry, colorful halo that gradually blended into the background.

The edge of the rainbow gradually faded until it disappeared completely.

The water sphere itself remains bright, but its projection and light path in the air have been hidden in the light mist.

Rudius knew the water sphere was there, but his sense of its location was blurred.

By sight alone, Rudius could not determine exactly which part of that large, bright area the water sphere was located in.

The originally starkly contrasting light path has completely transformed into a dreamlike mist that only appears in dreams.

"This is so beautiful too." Hilfi reached out and grabbed some of the light mist.

"I originally thought I'd see other rainbows," Rudeus replied.

"It's okay, Rudy, let's try other ways to look!" Hilfi encouraged.

"Hmm," Rudius said. "Silphie, try raising some more dust and see what happens."

Rudius decided to see what would happen if he added more dust.

"Dust?" Hilfi looked at the ground with a puzzled expression, but she couldn't see her feet at all...

……

As the steam dissipated, the experiment returned to a dust-dominated environment.

Rudius cast water magic again, waiting for the water sphere to calm down.

The familiar Buddha's light and little tail reappeared.

"Rudy, what would happen if we added another water balloon?" Hilfi asked.

Should we add another water balloon?

Rudius's next step was actually to shrink the light source so that he could observe the phenomenon of a thin beam of light passing through a water sphere.

However, since Sylphie had asked, Rudeus didn't mind going along with her interest for now.

Although the appearance of the second water sphere was completely unexpected by Rudius.

"Then... Sylphie, you can be the second water balloon!"

"Okay!" Hilfi replied energetically.

"Make sure the water balloon stays stable," Rudius added.

Judging from Hilfi's expression, she wants to do what she did yesterday: place the still unstable water sphere behind the stable one.

To prevent a repeat of yesterday where he played until he was completely exhausted, Rudeus stopped Sylphie.

That kind of schedule is unreasonable.

Obviously, after observing the phenomenon of stable water balloons, it doesn't stop people from playing the rainbow show.

"Okay," Shilufi agreed.

While waiting for Silphi's water sphere to calm down, Rudius pondered the possible outcomes.

Adding a second water sphere to cause the rainbow to converge into white light is impossible; Newton achieved the fusion of light by adding a convex lens between the two prisms.

Given the curved surfaces of two spheres, light will only be more dispersed, not converged.

In that case, if it were placed within the cone of light of Buddha's halo, one would probably see even more magnificent colors...

After the water balloon in her hand calmed down, Hilfi asked, "Rudy, where should I put the water balloon?"

"Hmm... I'll put it where the little tail is."

"Should we heat it up and see?"

"Heating it seems unnecessary. Even if the water gets a little hotter, it won't have much of an impact on the sunlight," Rudeus said, puzzled.

Rudius hadn't really considered temperature as a variable. He remembered that it affected the surface tension of water, but he didn't know how it affected the light passing through the water sphere.

"Let's give it a try!" After saying that, in order to keep the water sphere stable, Hilfi held up the second water sphere and slowly moved it towards the small tail of the first water sphere, which is the focal line.

The two watched calmly as the water sphere gradually approached.

I didn't expect anything amazing to happen.

However, just as the second water sphere approached the focal line, as Hilfi continued to move, the second water sphere shifted within millimeters.

The water sphere was then complete, displaying a continuous transformation of seven colors, from red to purple.

The unexpected and drastic change startled the two of them.

"Wow—"

Holy crap!

Sylphie's surprised voice and Rudius's native dialect came out at the same time.

In the chaos, the two lost their balance and the water spheres collided and merged together.

Then, amidst the chaotic magic, it lost its balance and fell to the ground.

puff~

Sylphie stared blankly at the water stains on the floor for a moment, then turned to Rudeus and said in a puzzled tone, "Holy crap~?"

Um... I was so surprised that I even blurted out my hometown dialect...

Rudius put his hand to his forehead.

"It means, very surprised..." Rudius explained.

"Holy crap~? Holy crap!" Hilfi repeated it again in confusion, then emphasized it with a more affirmative tone, clearly indicating that she had already learned it.

Oh my god, please don't learn this kind of thing so fast!

These words don't match your pretty little mouth at all!

Rudius looked at his own baby, and he was unusually flustered as if he were swearing for the first time.

"Hey... Sylphie! You can't say things like that!" Rudeus hesitated, then moved closer to Sylphie and earnestly warned her.

"Huh? Why can't I say?" Hilfi asked.

"Because that would affect my image of Sylphie!" Rudeus stated succinctly.

"Huh? Is that so?" Hilfi looked dumbfounded, clearly not understanding why this was the case.

"Yes, that's right, Silphie. You can't learn that word," Rudeus continued to instruct.

"But Rudy, you just said it yourself, I don't think Rudy's image in my mind has gotten worse," Hilfi questioned.

"Silphie, I was just making a strange noise. A lady wouldn't make such a weird sound," Rudeus added.

We can't exactly tell Hilfi that it was Fak's idea, can we?

"If I scream, Rudy, will you hate me?" Hilfi asked another question.

Rudeus gradually recovered from his panic and looked at Sylphie in front of him.

Even if it's just making weird noises, it's probably still kind of cute...

Rudeus had no choice but to change his tune, saying, "Sylphie, what I just said actually meant something very, very bad. Good children shouldn't say that."

"Is that so? I see. Rudy likes good kids..." Hilfi said, indicating that she understood.

Reasoning with children can be really exhausting sometimes...

No wonder there are so many unreasonable adults… Rudeus thought to himself.

……

Back home, Rudius lay in bed and reviewed the day's experiment with the AI.

So, is that little tail actually the same as the Buddha's halo?

However, the light there converges rather than diverges, so it merges into white light in the visual perception.

However, the deviation still exists, which is why such a dramatic change in color occurred when the second water sphere approached.

The second water sphere was practically a translation machine for light.

Rudius noticed that the AI's explanation mentioned the assumption of two completely identical water spheres.

This is equivalent to having a pair of twin lenses—their focal length, chromatic aberration capability, and aberration characteristics are exactly the same.

This will open up entirely new dimensions of observation.

Are they two identical water spheres?

That should be impossible. How could a person output the exact same amount of magical power twice?

I haven't specifically practiced this ability at all.

...Wait a minute, the original spell without incantation.

Rudeus recalled the basic version of the spell without chanting that he had used before.

If that magic is used, the water sphere that is created will be fixed.

Because whether you want the water sphere to grow bigger or smaller, you need to add more magic.

So as long as no additional magic power is added, it means the amount of water output is fixed... This way, you can get two exactly the same water spheres...

So, the water balloons that Hilfi made... tomorrow... two water balloons...

Rudius's eyelids grew heavy, and he slowly drifted off to sleep...