I Made Scientific Magic

  Chapter 324 My method is to use gears and light to compare speed!

  Under the bewildered eyes of everyone, Eloque installed the gear in front of the alchemy instrument that emitted light beams, and placed a very strange looking glass between them.

  Lin En finally explained. "This is a half mirror! It's different from ordinary glass. As the name suggests, only one side can let the light beam pass through!"

  Glenn looked back and forth in amazement, one side could clearly see the scene behind, while the other side was blurred.

"This experiment is also very simple, that is, this alchemy instrument emits a beam of light. When the gear is in a stationary state, the light will be reflected back the same way after passing through the gap between the teeth and hitting the mirror that cannot pass through the gear. On the other side, a larger spot of light is formed, allowing us to see it intuitively!"

   While talking, Lynn turned on the alchemy instrument, and two beams of light immediately appeared in the air.

  As he said, the light passed through the half-mirror, crossed the gap between the two gears, accurately hit the distant reflector, turned back, and hit the half-mirror through the tooth gap again.

"But if the gear starts to rotate...then the light passing through the gaps in the teeth may be blocked when it returns." Lynn paused, and with a thought, driven by the [Mage's Hand], the gear Slowly turned up.

Lynn doesn't need to explain too much, everyone can see that the light beam behind the huge gear starts to appear and disappear, and the light spot on the half mirror also becomes flickering, that's because When the light returns, it may just pass through the gap between the teeth, or it may be blocked by the gear...

   Just as the wizards were frowning and thinking about this phenomenon, Lynn's words came again.

   "Theoretically, if the speed of the gears is fast enough, the light will pass through the second gear gap when it passes through the first tooth gap and returns across a distance of eight kilometers, then in this way..."

  Before Lynn finished speaking, Glenn said in horror as if thinking of something. "In this way, every light element that can pass through the slit must return from the second slit, there is no possibility of being blocked, and the beams and spots will become extremely obvious!"

  Glenn's words were like throwing a boulder into a calm lake, and the wizards present immediately exploded.

   "This is really... a genius idea!" Raphael said in a trembling tone.

  Before, he had been thinking about what kind of method this magic star would use to measure the speed of light, but he didn't expect that the other party could do it with only a small gear!

  The method is characterized by two words, a trick!

  The most critical part of this experiment is to synchronize the time it takes for the gear to rotate a knot and the time it takes for the light to emit and return.

  The subtlety is that the light needs to pass through a full distance of eight kilometers, and the opposite gear only needs to rotate a small bit to reach the second tooth gap!

That is to say, each tooth pitch on the gear represents the distance that the light has traveled eight kilometers. If there are a thousand tooth pitches in total, and they make one revolution, the light has to travel eight thousand kilometers. Eighty thousand miles!

  The wizards who also understood this point couldn't help but gasped. This small gear is like a super amplifier!

  The speed of light may be incredibly fast, but the speed of the gears can also be increased extremely fast...

   "This is the speed ratio between gears and light!" Harov also sighed.

   It’s just that Lynn doesn’t talk about martial arts very much. The gear travels five millimeters (the distance of one tooth), and the light must run eight kilometers... a gap of hundreds of thousands of times!

  Finally, you only need to know the distance traveled by the gear multiplied by this multiple difference—that is, look at the number of teeth separated by the gear, and the number of turns of the wheel in one second, and you can inversely calculate the speed of light!

   No wonder Lynn is so confident that he can measure the speed of light...

   "It's amazing, worthy of being a magic star!" Sanchez said with a sigh.

  He is convinced, what kind of brain can come up with such an idea.

  However, there were also quite a few wizards watching with bewildered expressions.

  What the **** are you talking about? Why can't I understand...

  But in order to maintain his dignity as a wizard, he still nodded his head pretendingly, and followed up with a few words of appreciation.

   "Worthy of being a magic star..." "This idea is good! I knew he must have a way!"

  Among the voices of praise, there are also many voices of opposition hidden. Yasos and others insist that the speed of light is infinite. No matter how fast Lynn can accelerate the gears, it will be in vain!

   "My lord, can we start?" Lydia shouted loudly.

  Lin En nodded, and asked the halfling girl to start the internal combustion engine and increase the speed of the gears.

  Under the eyes of everyone, the 720-tooth gear in front of him slowly began to rotate, and then the speed became faster and faster, five revolutions per second, ten revolutions, fifteen revolutions... soon turned into an afterimage.

  The light beams and the light spots on the semi-mirror are also constantly flickering, and the frequency is getting faster and faster, because the light is always changing back and forth between passing and not passing...

   "It's so fast..." Witch Nancy murmured to herself, she couldn't see the speed of the gears at all. "At this speed, can light really distinguish the tiny gaps between teeth?"

   It is necessary to know that the distance between each tooth gap is only 0.5 cm, and it will become a sharp cutting instrument at high speed. What if the light element cannot find the tooth gap when it passes through? Wouldn't they not be able to see it?

   "We may not be able to tell the difference, but light will definitely be able to!" Lynn said confidently.

   "Look, the flickering frequency of the light beams and spots seems... to slow down!" Raphael hurriedly reminded.

   He was not the only one who noticed this, because the change was so obvious that it could not be an illusion. After the rotation speed of the gears increased again, the faces of the wizards present showed a look of horror...

   "The spot...disappeared!"

Sanchez's eyes widened, and there was an extremely strange scene in front of him. The tiny light beam emitted from the alchemy instrument stopped on the gear when it turned back, but the light beam at the distance from the gear to the half lens suddenly Disappeared, no longer appearing and disappearing as before, and there is no light spot on the half mirror.

   This is the exact opposite of what Lynn said...

   "What's going on here?" Raphael almost tore off his beard, his mind full of doubts.

   "That's because the light passing through the gaps of the teeth just hit the tooth joints when it returned. This shows that the speed of light is limited, and we have already succeeded in half!" Lynn's words rang in everyone's ears.

  (end of this chapter)