Chapter 466 Magic Proof of Invisible Light

Grete began to experiment.

Set up an experimental bench, get a light source, place a prism, and place a white cardboard on the other side of the prism - a classic dispersion experiment. Then, he placed a thermometer on each of the seven-color light area and the left and right ends, then squatted to the side and started scratching his chin:

How to prove ultraviolet light?

The proof of infrared rays is very simple. Outside the red light area, the temperature of the thermometer is extremely high, which can prove the existence of infrared rays. But what about UV rays? A thermometer in the ultraviolet light area does not heat up...

Silver bromide seems to be sensitive to ultraviolet rays, which can be proven by sensitizing silver bromide film... But where can I find silver bromide? Has the elemental bromine been extracted in this world?

"Auro! Auro!" Gretel shouted. The tower spirit MOSS passed his shout down layer by layer, and soon Aurora ran up:

"Gretel, what's going on?"

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

"I haven't heard of it..." Aurora was stunned, searched her memory, and shook her head in confusion. Seeing Grete's disappointed look, he immediately raised his hands and said:

"I'm going to read the paper! I'm going to read it! This is about the Change School next door, which is a bit far away from our Plasticity School. You have to give me time to check it out!"

Aurora clanked and ran down. Gretel put his hand on his forehead and sighed helplessly:

It seems a bit wasteful to let a sixth-level mage do this kind of work? Sure enough, we should recruit more apprentices... At least we can leave it to the apprentices to look through journals, check papers, search for information in the parliamentary database, etc...

Sigh, sigh, UV rays still need to be proven first. Gretel clasped his hands behind his back, bent over, spun around on the ground several times, and started pulling his hair again:

How to prove it? The sterilizing effect of ultraviolet light? He was best at this, but if he had to put his face on the microscope to verify the bacteria cultured by the teacher, he was afraid that the Lord of Thunder would kill him;

How about measuring the wavelength of ultraviolet light? The question is...how to measure the wavelength of light? He is a medical student, not physics!

Or, find another substance that is sensitive to ultraviolet rays, even if it is an animal... By the way, undead! Undead!

It is said that undead creatures, such as vampires, are afraid of sunlight. The main reason is that they are easily harmed by ultraviolet rays in the sun! As long as he can prove that undead creatures are sensitive to light outside the purple light area decomposed by prisms, it will prove the existence of ultraviolet light!

emmm…

Gretel flew down. He rushed to the laboratory next to the negative energy room on the second underground floor of the mage tower, and stretched out his palm to Master Lin En as a matter of course:

"Brother Lin En! Do you have any undead creatures here? Some are relatively weak, some are particularly weak. They will fall when the sun shines on them. Can you give me an experiment?"

Lynn raised her eyebrows at him in surprise.

A moment later, Gretel returned with satisfaction, carrying the new necromancer in the tower, classmate Leon Carlos, and a bag of bone fragments and finger bones that he had processed as replacement materials for skeleton soldiers...

The experiment was a success!

After the white light was decomposed by the prism, in the dark area outside the purple light area, the undead bone fragments reacted with invisible light waves!

Grete 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 evenly soaked with necromantic energy. Then, holding the watch, observe the changes in various parts of the bone fragment...

Facts have proved that the area illuminated by infrared and red light will suffer the greatest damage (Greit speculates that this is the same principle as the undead being afraid of fire), and the degree of damage decreases in order towards the back.

Then, when it came to the ultraviolet area, the extent of the damage to the skull's ribs showed another sudden jump!

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

Not bad, not bad, great!

Grete clenched his fist and wrote quickly. Experimental design, experimental equipment, experimental process, experimental results... After writing more than half of it, I stood up and stretched, and Cerela suddenly appeared out of nowhere:

"Gretel, what are you writing?... Prove that there are other lights besides the seven colors of light decomposed by the prism?"

She waved her fingers in front of the prism, tapping a little in the infrared area and a little in the ultraviolet area. Gretel's backhand hammer to the shoulder:

"Yeah, it's so troublesome. Especially ultraviolet rays, and there are no corresponding reagents..."

"What's the proof for this? Can't everyone see it?!"

"??" This is invisible light! Infrared and ultraviolet are both invisible light!

"I can see it!" Cerela insisted. She then hesitated slightly:

"Well... I can't say 'see' it on the red side, but I can feel it; it's very clear on the purple side, it's such a wide purple light band! Then, here!"

The index finger and thumb were spread out, and the width of about one hand was measured above the skeleton soldier's ribs. After looking at it, he retracted his index finger, extended his middle finger, and tried to make it as wide as possible.

Grete:......

Careless.

Visible light means light that can be seen by human eyes; there are many animals in this world that can see infrared and ultraviolet rays with their naked eyes. 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 applied [Dark Vision] on himself. Sure enough, in the infrared area, he saw the same faint image as the last time he checked whether there was any leakage in the laboratory, but it must not be ignored!

Grete continued to record: "Experiments have proven that [dark vision] can allow people to see images in this area... It can be seen that the principle of [dark vision] is that people can see infrared rays with the naked eye..."

Then, Grete inhaled and exhaled, summoning the totem snake spirit of the contract. Well, snakes can’t see UV rays…

What about the other stuff?

Where are the birds?

What about bats?

Very well, crows can see ultraviolet light, and magicians can also see ultraviolet areas through the eyes of the contract partner, although the picture they see is rather strange. In this way, the evidence is very rich and can be handed over to the teacher!

Grete wrote seven or eight pages eloquently, and early the next morning, he took the paper to the Tower of Babel to ask for an audience. The Lord of Thunder read ten lines at a glance, and after reading the paper, his expression was neither happy nor angry, and was unpredictable. This guy's experiment speed and paper speed are indeed fast enough, and what he writes is of sufficient weight, but...

"What about frequency?"

"What?"

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

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

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

There were two "pop" and "pop" sounds, which made Gretel jump twice in shock. He very much doubted that if he hadn't dodged quickly, these things would have hit him on the head...

"Let's take a look." The Lord of Thunder raised his chin slightly. Gretel carefully picked up the book on the left and glanced at the cover:

"On Light"

This topic is so big... He turned one page, then another, and soon he started to feel dizzy:

"...Each surface element on the wave front can be regarded as the secondary disturbance center that generates the spherical wavelet, and the position of the wave front at any time in the future is the envelope surface of this wavelet..."

Grete put it down silently and looked at the next paper. Very good, this topic is a little smaller, "Some Research on the Diffraction of Light":

"The vibration of a point in front of the wave array is the superposition of wavelets emitted by the elements above the wave array at that point..."

I looked at it and saw that it was a text that I couldn't understand at all...

Gretel calmed down and looked at the third and fourth copies. After flipping through a thick stack of papers, I only confirmed one thing:

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

OK, so the other side is the paper supporting the particle theory? Grete lay on the other side and flipped through the pages, and sure enough, he saw the familiar "ether" among four or five consecutive papers.

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

Gretel put down the paper. He took a deep breath, looked directly at the Lord of Thunder, and said calmly:

"I don't want to study this."

"Um?"

"My interest is not here." In terms of waves, in terms of particles, they have been rolling around and pinching each other for three hundred years, and it will end when they develop into wave-particle duality——

The problem is, you haven’t even finished measuring the elements, you haven’t observed protons, neutrons, and electrons, and it’s even more impossible to discover the photoelectric effect. Take the wave-particle duality in the first place!

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 never belong to you." The Lord of Thunder said solemnly. What a pity. Just discovering infrared light and ultraviolet light is nothing. If their properties can be analyzed, this paper will definitely be included in "Arcana"!

He secretly regretted that Gretel shook his head quickly, as if he didn't want to get involved. The Lord of Thunder did not force his head to be pressed, but immediately proposed an alternative plan:

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

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

Magical strength, laboratory, experimental equipment, meeting all the conditions, at least a high-level mage can do it.

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

Fortunately, little Gretel doesn't value research honors that much...

However, Grete hesitated and remained silent. The Lord of Thunder narrowed his eyes slightly:

"how?"

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

"……roll!"

Grete turned around and ran away.

****

Your enthusiasm for infrared and ultraviolet light verification methods is really beyond my expectation...

In the chapter last night, most of the book reviews were about proof methods (dumb), which reminded me of your enthusiasm when asking how to convert alternating current to direct current...

Routinely asking for subscriptions, monthly tickets, recommendation votes, book reviews...all kinds of...