Chapter 548 254: At Kang Bridge, Waved the Sleeve, Summoned a Black Cloud (Part 1)_3

But this process is fleeting.

Because each oscillation is accompanied by a slight energy loss, causing the voltage across the capacitor to quickly drop below the breakdown value again.

Seeing this situation.

Old Fa and the others looked calm, with almost no noticeable fluctuation.

This is a common phenomenon in the laboratory, and the scientific community in 1850 was not unfamiliar with high-frequency oscillating circuits... which is the LC circuit.

But in the next second.

The facial expressions of Old Fa and the others suddenly underwent a huge change, even... some distortion!

Stokes let out a high-pitched sound comparable to a C5 note, sounding somewhat distorted:

"My God, what... what is this?"

No one had the mind to mock Stokes' duck voice; at this moment, everyone's gaze was focused on the receiver not far away:

At this very moment.

Every time the generator emitted a blue electric spark, electric light flickered between the copper rings on the receiver!

Under the guidance of some unknown force, in a receiver not connected by wires...

Current appeared!

Old Fa even walked up to the receiver as if no one was around, observing the flickering spark closely, murmuring:

"Jesus..."

The entire process lasted for several minutes; finally, Xu Yun estimated that the effect was about right and went forward to turn off the switch.

Silence fell upon the scene, looking just like a paused moment in a small movie.

After a while.

Old Fa strolled back to the group, looked at Wheat with complex eyes, and said:

"Maxwell, your guess was correct; an electric potential difference appeared on the receiver."

Wheat scratched his head clumsily, chuckling continuously.

Then Old Fa looked at Xu Yun, with eyes hard to interpret.

How many times had he been surprised by this Eastern person today?

Indeed.

Although these experiments should be credited to Fat Fish, Xu Yun was able to replicate them proficiently; naturally, there's no need to speak further about his theoretical level.

He had heard from Hewell that Xu Yun used a personal letter from Little Niu to exchange for an admission slot, although he didn't say it aloud, inside he somewhat felt this person had little "self-awareness."

But now it seems...

He was very, very wrong.

Then Old Fa took a deep breath, bringing his mind back to reality, and asked Xu Yun:

"Luo Feng, what is this phenomenon called?"

Not asking for the reason indicated that Old Fa had figured out many things in this short time.

Xu Yun paused for a moment, then said a name:

"Photoelectric Effect."

That's right.

The third round of experiments chosen by Xu Yun was indeed the renowned Photoelectric Effect!

Throughout the history of human science.

There are only two phenomena that can truly serve as core evidence to refute the theory of wave propagation:

The Compton Effect and the Photoelectric Effect.

The Compton Effect requires X-ray assistance, and currently, the tech tree of the dungeon hasn't reached that level.

Therefore, at the very start of the event, Xu Yun's options were actually already determined.

The Photoelectric Effect was discovered by Hertz in 1887, with its final explanation provided by Einstein.

Actually.

In terms of definition, the Photoelectric Effect is very simple.

It involves using light to irradiate a metal plate, after which some electrons within certain substances absorb energy and emerge to form a current.

That's photo-generated electricity.

In later generations, the experiment on the Photoelectric Effect in schools is generally demonstrated with a zinc plate as the main display component, followed by a discharge detector connected behind it.

Then the teacher uses light to irradiate the metal plate, and the discharge detector gradually opens, indicating that electricity has been generated by light.

A more responsible teacher will even take out a rod charged negatively by rubbing with fur; after touching the discharge detector, it closes, thus demonstrating that the metal carries positive electricity, etc...

But actually.

The significance of the Photoelectric Effect is far from being as simple as it appears.

Otherwise, Xu Yun wouldn't have bothered to bring up the Photoelectric Effect after finishing the Photovoltaic Effect:

Although everyone in later generations knows that the Photovoltaic Effect and the Photoelectric Effect are two different things, one involves the surface and the other the interior.

But in 1850, an era when electrons hadn't been discovered yet, the two were somewhat similar in terms of phenomenon.

Once again.

Xu Yun's aim was to shake the classical physics building a little bit...

The current situation is shocking enough, but still slightly short of shaking the physics building.

Returning focus to reality.

"Photoelectric Effect..."

Old Fa repeated this term, looking thoughtful:

"Photo-generated electricity, electrochemical light... what a good name..."

But while thinking, Old Fa suddenly frowned and realized a certain issue:

"Wait, Luo Feng, that's not right."

"Although the phenomenon of the Photoelectric Effect is amazing, strictly speaking, it seems to merely extend the Photovoltaic Effect into air."

"It cannot refute the theory of light's wave propagation nor significantly affect the existing physics system, so those words you said earlier..."

Upon hearing Old Fa say this, the other professors began to reflect.

Indeed.

Xu Yun's serious tone had made them think it involved reshaping viewpoints, possibly threatening the collapse of the existing scientific framework.

Some professors with rich imaginations had even prepared themselves for 'martyrdom'.

But in the end...

That's it?

Seeing Old Fa's puzzled expression, Xu Yun didn't offer much explanation.

Instead, he took something from Wheat's hand, placed it in his palm, and held it out to Old Fa:

"Faraday, don't worry, have a look at this thing first?"

......

Note:

The schedule over these days has been like the Underworld, with wake-ups at 6 PM or 11 PM, so the update times are rather chaotic.