Chapter 540 252 Turn the World Upside Down!! (8.8K)_4

Professor Faraday pondered for a moment, then gestured for him to come forward, his tone noticeably more relaxed than before:

"Student Luo Feng, what do you mean by that?"

Xu Yun obediently walked over to his side, glanced at Old Fa's handsome face, and explained:

"Professor Faraday, although the light path has three stages and two values, making the calculation very complicated."

"But don't forget, the rotation speed of the spinning mirror is easy to measure and can be calculated using variable methods to ascertain a direct correlation."

"So in actuality, we only need to measure the difference in the speed of the gear when we see the reflection vanish twice consecutively, even if it means adjusting multiple times..."

After Xu Yun finished speaking, he hesitated for a moment, picked up the pen on the table, and seeing that Old Fa didn't stop him, he wrote down another formula:

2lw/c+Θ=(n+1/2)2π/n.

Compared to Old Fa's formula, he corrected two values.

Xu Yun then explained:

"Θ represents the relative angle between the observer's aligned gear position and the candlelight's aligned gear position, n is any number, and this is the extinguishment boundary condition."

"Simplified it is... 2l△w/c=2π/n."

"..."

Following Xu Yun's words, the scene instantly plunged into an eerie silence.

After a while.

The old professor who previously proposed 2l+2d suddenly slapped his forehead, speaking to another person he had been debating with not long ago:

"Oh dear, Professor Verthongen, I've heard London recently opened a store selling live maggot cheese, and the taste of the fly larvae inside is excellent. Should we go and try it sometime?"

"That would be wonderful, my wife recently bought a very sexy swimsuit, would you like to come over this weekend to take a look?"

"Great, great!"

Watching the awkward chatter between the two professors, Xu Yun's mouth twitched slightly:

"..."

Anyway.

He had heard about the live maggot cheese the old professor mentioned; it's a bizarre cheese from Italy, called Casu Marzu.

It's said that when the maggots are touched, they jump around in your mouth like Pop Rocks candy...

Ahem.....

Subsequently, Old Fa recalculated Xu Yun's formula, put down his pen, and sighed with emotion.

Though the person who proposed the entire experimentation idea is Mr. Feiyu, Xu Yun seemed to be just a carrier.

But Xu Yun being able to keep up with the thought process of his discussions with other professors is sufficient evidence that his knowledge reserve is not lacking.

With the thought verification complete, the next step is the practical implementation.

After obtaining permission from Prince Albert.

Xu Yun walked over to the fixed light source... next to a flashlight, and pressed the switch.

Shwish——

A beam of light emitted from the flashlight.

Then, under the focal point of a lens coated with a slight amount of mercury, it transformed into an extremely fine thread of light.

The light thread hit the slowly turning spinning mirror directly and immediately began refracting toward the concave mirror five kilometers away.

In the darkness.

The beam of light traveled straight along the blocked path, under the watchful eyes of everyone along the way, striking the center of the concave mirror.

At the same time.

Old Fa stood beside the imaging board, starting to observe the situation on it and actively reporting:

"The light spot is intermittently bright and dim on the left side, what's the rotational speed of the mirror?"

Stokes, who was next to the spinning mirror, glanced at the dashboard, then reported a number:

"60 RPM!"

Old Fa exchanged a glance with Xu Yun, who was beside him, and asked:

"Student Luo Feng, increase it to 300 and try?"

Xu Yun nodded:

"Okay."

The rotation speed quickly increased.

300 RPM per minute, the period is 60/300=0.2 seconds.

ω=2π/T=10πrad/s.

From a future perspective, this speed is clearly inadequate; for a five-kilometer light path, the speed needs at least 800 RPM.

However, Xu Yun decided to let Old Fa and the others explore slowly from a practical angle.

Ten minutes later.

Old Fa looked at the light spot at the center point of the imaging board, faintly realizing something, his face flushed.

At the same time.

Stokes came up to him holding a table with a vast amount of recorded data and respectfully said:

"Mr. Faraday, the data has been compiled. All the professors unanimously believe that you should be the one to complete this final step of calculation."

Currently, including Prince Albert, no one objected to Stokes' words.

As the linchpin who pried open the doors to the second industrial revolution single-handedly, indeed, no one was more suitable than Old Fa to complete this final step.

Upon hearing this, Old Fa took a deep breath, accepted the table, and started to calculate on-site.

"L=20 meters, d=5000 meters, △s=0.0007 meters, △Θ=1.4232°, W=26.7π radians/second..."

Although a crowd of onlookers stood beside the console, no one dared utter a sound, as silent as the Busan Library in 2022.

Only the rustling sound of the fountain pen and parchment contact was faintly audible.

Ten minutes later.

Old Fa put down the fountain pen and sighed with a complex expression.

After a long silence, he ultimately remained speechless.

The nearby Prince Albert stepped forward and picked up the parchment for a glance:

"Light speed.....298,372 kilometers per second?"

Old Fa nodded slowly yet firmly, removed his glasses with trembling fingers, and pinched his nose bridge, feeling complicated.

The principle of measuring light speed with a spinning mirror is simple; compared to the method using Io, it's clearly far more intuitive and precise.

Previously, scientists had accepted the figure of 212,000 kilometers/second because of the double endorsement by Huygens and Little Niu

And the scientific community couldn't find a method to measure light speed besides using stars.

In everyone's subconscious, measuring light speed seemed to require an extra-terrestrial dimensional space.

Unexpectedly...

Xu Yun used just a few mirrors to easily measure the speed of light on Earth?

"Mr. Feiyu, truly terrifying..."

And just as Old Fa was amazed, an untimely voice suddenly sounded in the open space:

"Isn't it wrong, Mr. Luo Feng? Didn't you say you could offer evidence to refute the wave theory? What is the direct connection between measuring light speed and the wave theory?"

Old Fa and Xu Yun instinctively looked over.

As expected.

The speaker was Angus Roman.

Looking at Angus Roman somewhat agitated.

Xu Yun suddenly broke into a brilliant smile, revealing a set of white teeth:

"Indeed, measuring light speed is just the appetizer; the main course is yet to come."

........

Note:

It's my birthday today; although I'm past the age for a birthday cake, can I ask for some monthly passes?

It's really my birthday, not an excuse for monthly passes, the spam block texts and a bunch of birthday reminders made me remember.....