This lord is very scientific

Chapter 758 Photoelectric Effect and Lin Ke's Equation!
Lin Ke's voice was deafening.

Before he broke through the fifteenth level, Andrew did tell him.

Before he broke through, Emperor Wusian, Ruiwen, Auf, Lika, etc. all told him how to break through level [-].

He can be sure that everyone is really thinking of him.

It's just that at that time, he reversed a mistake he often made in his previous life, that is, he trusted his elders too much.

In previous lives, whether it was relatives or teachers, many times they taught future generations based on the experience and judgment formed from their own subjective perspective.

Sometimes it is true, because their experience does work.

But sometimes it is undeniably wrong.

After all, you must have your own judgment and practical methods, and you can't confine your vision and revenge by the sentence "for your own good", or directly deny what you have seen and heard.

Reject empiricism and dogmatism!
At this time, what Lin Ke wants to teach everyone is the same.

It has to be said that many students are actually quite obedient.

Why do you say blind obedience?

It's not that they didn't think in the experiment, but they didn't think of their own.

Others say that this experiment can prove that light is a particle, and then they judge whether the experiment is wrong, yes, then believe it.

Others said that another experiment could prove that light is a wave, but they judged it and found it to be true.

But they overlooked one point.

Whether light is a particle or a wave, as a [scholar], shouldn't you think about how to observe and how to judge?

The world does not mean that there is only one kind of experiment that can prove that light is a particle or a wave.

As a [scholar], shouldn't I be inspired after seeing other people's experiments, and then think about another experimental method that can be proved?
Just like what Andrew said back then.

As a strong person on the [scholar] side, Lin Ke can't try it out by himself and see how the best way to break through level [-] is?
Someone else's is always someone else's.

Therefore, Lin Ke's words at this time are very beneficial to everyone.

"That's it...that's it..."

"The principal's words are indeed so thought-provoking!"

"I... I broke through!"

"Me too!"

"I'm not far away! There are indeed too many doubts about some past experiments..."

"It's so shocking, it's so admirable, it makes me suddenly enlightened!"

Not to mention the students, the teachers, staff, and various visitors at this time all felt suddenly enlightened.

At this time, Lin Ke finally said his last experiment of the day: "...Finally, I will do the last experiment, which is the experiment to prove whether light is a particle or a wave."

"But, gentlemen."

Speaking of this, Lin Ke's tone became a little more serious: "I did this experiment just to verify what I thought in my heart. It's not an authority, and it doesn't mean that what I make must be the truth!"

"Not only the best, not only the book, but only the truth!"

"This is the real [scholar]!"

With that said, Lin Ke waved his hand and started researching.

What experiment is he going to do?
Double-slit interference experiment!

The instruments behind Lin Ke started to change.

To prove the wave-particle duality, it is mainly Young's double-slit experiment.

That is, a candle is placed in front of a piece of paper with a small hole, thus forming a point light source.

A light source is emitted from a point, and another piece of paper is placed behind the paper. The difference is that two parallel slits are opened on the second piece of paper.

The light emitted from the small hole passes through the two slits and is projected onto the screen, forming a series of alternating bright and dark fringes, which are known as double-slit interference fringes.

In the last life, when did scientists discover the wave-particle duality?

This is a character that cannot be escaped - Albert Eins!

Albert Einstein explained the photoelectric effect with the concept of photons, and physicists began to realize that light waves have dual properties of waves and particles.

Afterwards, de Broglie proposed the "matter wave" hypothesis, and he argued that "all matter" has wave-particle duality, that is, it has the dual nature of waves and particles.

According to the de Broglie hypothesis, electrons should have fluctuation phenomena such as interference and diffraction.

Then the Davidson-Germer experiment designed and completed by Davidson and Germer successfully confirmed the de Broglie hypothesis.

That is to say, light does exhibit two properties.

But at this time, watching the experiments of various equipment behind Lin Ke, the people from the following two schools gradually couldn't sit still.

"This... this is impossible!"

"How is this possible, light is obviously electromagnetic waves!"

"Why particles?! No! There are also wavelengths..."

"This observation... this observation..."

The students are boiling, especially the physics students.

Lin Ke, on the other hand, not only did the double-slit experiment, but also conducted other experiments at the same time.

The Photoelectric Effect...Matter Waves...

So, Lin Ke's voice of explanation directly overwhelmed everything:
"...a photon from the upper left hits the metal surface, dislodges the electron from the metal surface, and travels to the upper right."

"I think that shining a beam of light on a metal surface causes it to emit electrons, which are called photoelectrons."

"Of course, in order to produce the photoelectric effect, the frequency of light must exceed the characteristic frequency of metal substances, which is the 'floor frequency'.

For example, if a blue light beam with a very weak irradiance is irradiated on the surface of potassium metal, as long as the frequency is greater than its bottom frequency, it can make it emit photoelectrons, but no matter how intense the irradiance is, once the frequency is lower than that of potassium metal If the limit frequency is low, it cannot promote the emission of photoelectrons. "

"According to the theory of light fluctuations, the irradiance or amplitude of light waves corresponds to the energy carried, so a beam with very strong irradiance must provide more energy to drive electrons out, but the fact is exactly the opposite of the classical theory. "

Link paused, and continued after talking about Einstein's photoelectric effect theory:

"In my opinion, a light beam is a group of discrete quanta, now called photons, which fluctuate continuously. From the law of black body radiation, I deduce that the energy E possessed by each photon that composes a light beam is equal to the frequency ν times a constant, that is Linker's constant, and finally I made the 'Linker photoelectric equation'..."

Lin Ke's voice was still steady.

For a long time, no intelligent life has ever directly observed particles showing the form of waves and particles at the same time, at most it is the theoretical derivation and conjecture of some people.

At this moment, following Lin Ke's narration, corresponding changes took place in the crystal wall system of the entire Nasenge planet.

"Rumble..."

The crystal wall system that had changed not long ago began to tremble terribly when Lin Ke spoke.

There are several rules looming in a row, and even some of them are directly connected, as if to further form rules.

It even seemed to faintly affect the fundamental law.

Nassanger, the sky has changed!
(End of this chapter)