It's not that hard to open a hospital in another world, right?

Chapter 466 The Magic Proof of Invisible Light

Gretel started to experiment.

Set up a test bench, set up a light source, place a prism, and place a white cardboard on the other side of the prism—a classic dispersion experiment.Then, in the seven-color light area plus the left and right ends, put down a thermometer each, squat down to the side and start scratching your chin:

How to prove the ultraviolet light?
The proof of infrared rays is very simple. Outside the red light area, the temperature of the thermometer is particularly high, which can prove the existence of infrared rays.But what about UV rays?A thermometer in the ultraviolet region without heating up...

Silver bromide seems to be sensitive to ultraviolet rays, and it can be proved by using silver bromide negative film...but where can I find silver bromide?In this world, has the elemental bromine been extracted?
"Olo! Oro!" cried Gretel.Taling MOSS passed on his shouts layer by layer, and soon, Aurora ran up:
"Gretel, what's the matter?"

"What progress has the council made on the elemental substance recently?" Gretel asked a series of questions: "Have you found a reddish-brown elemental substance with a foul smell?"

"I don't seem to have heard of it..." Aurora was startled, searched her memory, and shook her head in doubt.Seeing Gretel's disappointed look, he immediately raised his hand and said:

"I'm going to look up the thesis! I'm going to look it up! This is a matter of the School of Change next door, and it's a bit far away from our School of Evocation. You have to give me time to look it up!"

Aurora ran down ding ding dong dong.Gretel put his hands on his forehead and sighed helplessly:
It seems a bit wasteful for a sixth-level mage to do this kind of work?Sure enough, we should recruit a few more apprentices... At least look through periodicals, look up papers, go to the parliamentary database to find information, etc., you can leave it to the apprentices to do...

Sigh to sigh, the ultraviolet light still needs to be proved first.Gretel bent over with his hands behind his back, turned around several times on the ground, and began to pull his hair again:

How to prove it?Germicidal effect of ultraviolet light?He is the best at this, but if he wants to verify the bacteria cultivated by the teacher with his face pressed against the microscope, he is afraid that the Lord of Thunder will kill him;

Simply measure the wavelength of ultraviolet light?The question is... how to measure the wavelength of light?He is a medical student, he is not a physics major!
Or, find another substance that is sensitive to ultraviolet rays, even animals... By the way, undead creatures!Undead!
It is said that undead creatures are afraid of the sun, such as vampires, the main reason is that they are easily damaged by the ultraviolet rays in the sun!As long as he can prove that undead creatures are sensitive to the light outside the purple light area that is decomposed by the prism, it proves the existence of ultraviolet rays!

Emmm...

Gretel sprinted down.Rushed to the second basement of the mage tower, the laboratory next to the negative energy room, and stretched out his palm to mage Lynn as a matter of course:

"Brother Lynn! Do you have any undead creatures here, weak ones, especially weak ones, that will fall when the sun shines, give me an experiment?"

Lynn raised an eyebrow at him in surprise.

After a while, Gretel took the new necromancer in the tower, classmate Leon Carlos, and a bag of bone fragments and finger bones that he had processed and prepared to be used as replacement materials for skeleton soldiers, and returned with satisfaction...

The experiment was a great success!
After the white light was decomposed by the prism, the dark area outside the purple light area, the necromancer bone fragments reacted with the invisible light waves!

Gretel was greatly encouraged.He imitated the idea of ​​using a thermometer to measure infrared rays, and asked Carlos to put down a long bone (it looked like a rib) that was long enough and uniformly soaked in necromantic energy.Then, pinch the watch to observe the changes in the various parts of the bone fragment...

Facts have proved that the area irradiated by infrared and red light suffers the most damage (Grete guesses that this is the same principle as the undead creatures are afraid of fire), and the degree of damage decreases in turn to the later part.

Then, in the ultraviolet region, there was another sudden jump in the extent of the damage to the skeleton's ribs!

This evidence is enough to prove that there are high-energy rays in the ultraviolet region!

Not bad not bad, great!
Gretel clenched his fist and wrote vigorously.Experimental design, experimental equipment, experimental process, experimental results... More than half of the writing, straightened up and stretched, Cerilla suddenly appeared out of nowhere:

"Grete, what are you writing about?... Proving that there are other rays of light besides the seven-color light that the prism decomposes?"

Her white fingers flicked in front of the prism, tapping a little in the infrared region and a little in the ultraviolet region.Gretel hits the shoulder with a backhand:

"Yeah, it's so troublesome. Especially ultraviolet light, and there is no corresponding reagent..."

"What is there to prove? Can't everyone see it?!"

"??" This is invisible light!Infrared, ultraviolet, are invisible light!

"I can see!" Cerilla insisted.Then she hesitated slightly:
"Hmm... the red side can't be said to be 'seeing', but it can be felt; the purple side is very clear, it is this-such a wide purple light band! Then, here!"

Spread the index finger and thumb apart, and measure about a span above the skeleton soldier's ribs.After looking at it, he retracted his index finger and stretched out his middle finger, trying to increase the width as much as possible.

Gretel:  …

Careless.

Visible light, it means, the light that can be seen by the human naked eye; in this world, there are many animals that can see infrared and ultraviolet rays with the naked eye.As for the issue of communicating with animals... This world is a magical world!
And, there is indeed magic that allows people to see infrared rays directly!
Gretel raised his hand and swiped [Dark Vision] for himself.Sure enough, in the infrared region, he saw a faint image, which must not be ignored, just like the last time he checked whether there was a leak in the laboratory!
Gretel continued to record: "Experiments have proved that [Dark Vision] can allow people to see images in this area... From this, it can be seen that the principle of [Dark Vision] is that people can see infrared rays with the naked eye..."

Then, Gretel inhaled and exhaled, summoning the contracted totem snake spirit.Ugh, snakes can't see UV rays...

What about other things?

Where are the birds?

Where are the bats?
Very well, crows can see ultraviolet rays, and magicians can also see the ultraviolet region through the eyes of the contracted object, although the picture they see is rather strange.In this way, the evidence is very rich, and it can be handed over to the teacher!
Gretel wrote seven or eight pages eloquently, and early the next morning, he went to Tongtian Tower with his paper in his arms to ask for an interview.The Lord of Thunder has ten lines at a glance, and after reading the paper, his face is neither happy nor angry, and it is unpredictable.This kid's experiment speed and thesis speed are indeed fast enough, and the things he writes are also weighty, but...

"What about the frequency?"

"What?"

"What about the frequency of these two kinds of light? - Didn't you say yesterday that the frequency of infrared light is lower than that of red light, and the frequency of ultraviolet light is higher than that of blue-violet light? What about the frequency?"

"...I don't know how to test..."

The Lord of Thunder inhales, exhales, inhales again, exhales again.With a hook of the finger, the door of a walnut bookcase next to it popped open automatically, and two thick stacks of books, periodicals, and papers flew out, one left and one right, and landed on the table in front of Gretel.

There were two "pops" and "pops", which made Grete jump twice in shock.He was very skeptical that if he hadn't been able to hide quickly, these things would have hit him on the head...

"Look." The Lord of Thunder raised his chin slightly.Gretel carefully picked up the one on the left, and glanced at the cover:
"Theory of Light"

This topic is so big... He turned a page, and another page, and soon began to feel dizzy:
"...Each surface element on the wavefront can be regarded as the secondary disturbance center that produces a spherical wavelet, and the position of the wavefront at any time in the future is the envelope surface of this wavelet..."

Gretel silently put it down and read the next paper.Very good, this topic is a bit small, "A Little Research on the Diffraction of Light":
"The vibration of a point in front of the wave front is the superposition of the wavelets emitted by the elements above the wave front at that point..."

Confirmed the eyes, it is a text that I can't understand at all...

Gretel settled down and read the third and fourth copies.After reading a thick stack of papers, only one thing was confirmed:

In the magic world, there are a large number of magicians who think that light is a kind of wave.

OK, so the other side is the paper that supports the particle theory?Gretel lay on the other side and looked through it. Sure enough, in four or five consecutive papers, he saw the familiar "ether".

Very good, very good, the particle theory and the wave theory have lived up to expectations, and they are also fighting here!

Gretel put down the paper.He took a deep breath, looked directly at the Thunder Lord, and said calmly:
"I don't want to study this."

"Ok?"

"My interest is not here." Let's talk about waves, talk about particles, 300 years of tumbling and pinching each other, and it will only end when it develops into wave-particle duality——

The problem is that you have not even measured the elements, protons, neutrons and electrons have not been observed, and the photoelectric effect is even more impossible to discover, so take your head to the wave-particle duality!

I don't want to jump into the big pit of theoretical physics!
"If you don't study it, the honor in the future will not belong to you." The Lord of Thunder said in a deep voice.What a pity, just discovering infrared light and ultraviolet light is nothing. If we can analyze their properties, this paper will surely be able to be published in "Arcane"!

He secretly regretted that Gretel shook his head quickly, as if he didn't want to touch his hand.The Lord of Thunder did not press his head forcibly, and immediately proposed an alternative:

"Then, I can find someone to complete this part, and count him as the first author, is that okay?"

Fortunately, he had already thought about this, and even had three candidates in his mind.Although it is a pity to share the honor, it is not so easy to determine the wavelength of light.

Magical strength, laboratories, and experimental equipment meet all the conditions, at least high-level mages can do it.

Based on the strength comparison between the two sides, the position of being tied for the first place must be given no matter what.

Fortunately, Little Gretel doesn't pay much attention to research honors...

Gretel, however, hesitated, but remained silent.The Lord of Thunder narrowed his eyes slightly:
"how?"

"How long will it take to test this... I'm waiting to publish the paper, so I can recruit apprentices!"

"……roll!"

Gretel turned and ran.

****
Your enthusiasm for the IR-UV proof method is beyond my expectations...

In the chapter last night, more than half of the book reviews were about the proof method (stay), which reminded me of your enthusiasm when you asked how to convert alternating current to direct current...

Routine requests for subscriptions, monthly tickets, recommendation tickets, book reviews... all kinds of...

(End of this chapter)