Double slit interference experiment, has your worldview been turned upside down?

To be honest, the double-slit interference experiment did have a big impact on my worldview. Actually, this experiment is very simple, but the difficult thing is that you have to learn to look at the microcosm without the concept of the macrocosm. The double-slit experiment is essentially a natural phenomenon, and in the past, we were accustomed to conforming the phenomenon to an existing empirical framework, but this time we are building a new experience to conform to the phenomenon.

But I have to admit that the latter is the most commonly used way on the road of science. <

Double-slit interference experiments are divided into two categories, the first is about the interference of light, and the second is about the interference of electrons. I'll give you an example in my non-rigorous language: Let's say I'm a particle in this experiment, and when the experiment starts, I really feel it passing through one of the cracks.

But later, under the same conditions, I could do another experiment, and I might have passed through another slit. That is, a definite cause produces an indefinite effect with a probability distribution. Even if I hit my head against the wall, there is a certain probability that I will pass through the wall.

Under the same conditions, if you do another experiment, the results of the observed and unobserved experiments will be different. Strictly speaking, it only takes "information transfer" to occur, and it does not necessarily require human involvement. In 1979, physicist John Wheeler first proposed the "quantum delay choice experiment" at the conference.

The results show that even delayed observation can affect the process. In other words, I have already passed through a certain gap, but whether or not I am observed behind it will affect which gap I have passed through before. In addition to proving that the law of cause and effect has changed from deterministic to probabilistic, this experiment also wants to prove that the future can determine the past.

It's really scary to think about. <>

Strictly speaking, for microscopic particles, they do not have the concept of "flight", "trajectory", or "passing through a gap". It is described in terms of probability density distribution, that is, the probability distribution of a physical quantity detected at a certain place and at a certain time. The interference fringes that you see are a macroscopic representation of this probability distribution by a large number of particles.

For you, that's an obstacle that leaves a gap. And what are the obstacles for microscopic particles? And what is a sew?

In fact, it is just the corresponding probability. <>

It's definitely an experiment to subvert the worldview. The presence of an observer can influence the outcome of an experiment, and it's scary to think about. The human possession of knowledge does not feel able to explain this result at all, and it feels incomprehensible.

I studied physics myself, and I have done this experiment myself, so seeing this experiment, my worldview has not been subverted.

The horror conclusion of the double-slit interference experiment isFrom a particle point of view, there is no way to explain it. Because when the particle is in the half-lens 1, it will either take the path of reflection 1 or the path of 2, so how can it interfere in the half-lens 2? So it can only be explained by the wave explanation, i.e., it passes through two pathways at the same time.

In a single-photon experiment, if there is no half-lens2, a single photon is a particle, and if there is a half-lens2, then it is a wave again. Then, first of all, do not use the half-lens 2, if it can be done at the moment after the photon passes through the half-lens 1.

When the photon has a 50% probability of choosing path 1 or path 2, and the semi-lens 2 is added at the moment when it has not reached the half-lens 2, then the photon still has a 50% probability of going to detector 1 or detector 2 on the half-lens 2.

Characteristics of double-slit interference experiments

First, let's explain the experimental setup. A beam of monochromatic light passes through a semi-reflective half-lens, divides into two beams of light of equal intensity, and then meets at a position after being reflected by the mirror, if a semi-reflective half-lens is placed at this position, and the optical path difference of the two beams is precisely adjusted, then one of the two detectors can always get the light of interference superposition, and the other always gets the light of interference and depletion.

However, this is only an explanation, and in reality, we can see light as either a mere particle or a mere wave. Particle nature and wave are only two aspects of it, limited by human observation conditions, we either see particle nature or wave nature, which is one-sided.

The center of the screen is a zero-level bright stripe, and the sides are parallel and evenly spaced light and dark stripes.

The characteristics of the fringes of the double-slit interference experiment are:

1. Light and dark stripes;

2. Stripes are arranged at equal intervals;

3. The intermediate level is low;

4. There is only one zero-level clear pattern;

5. In addition to the zero level, the other levels of orange terrestrial distribution are symmetrically distributed;

6. In the case of device determination, the longer the wavelength of incident light, the greater the spacing of dust stripes.

The reason why the double-slit interference experiment is terrifying is that when the observer appears, the interference of the light particles disappears and then turns into two stripes. As if these light particles do not like the attention of others, they appear when they see them, and they do not appear when they are not, which cannot but make people feel terrible suspicions.

Physicists inject electron beams through small holes in the front plank, so that the electrons probabilitarily pass through the double-slit plate behind the hole, and finally fall into the screen behind.

By single-slit diffraction, we can deduce that double-slit diffraction is also a reflection of light. But there are so many people in the society under the guise of popular science, deliberately fooling the public, claiming to use a single photon source to emit a laser, a photon to a double slit, I want to ask you to use the single photon generator is the first production, provide the model, technical parameters. If not, what is your purpose in fabricating facts and fooling the public?

So why is the double-slit experiment terrifying? What is the reason?

I think it's someone who doesn't want us to know the truth of the matter, and that's the real reason why it's horrible.

It's not scary at all, as long as you understand the principle. You can take a look at Yang Jiafu's "Atomic Physics", which has already explained the reason.

First of all, we need to know what is called the double-slit interference experiment, in fact, this experiment is not new to us engineering students. When I was in college, many majors had to conduct such a physics experiment. First of all, what is the double-slit interference experiment, it refers to the parallel monochromatic light, projected onto a baffle with two slits, the distance between the two slits is very close, the light waves of the parallel light are transmitted to the slit at the same time to become two wave sources with the same vibration situation, this wave source is called a coherent wave source, and the light emitted by them is superimposed on each other in the space behind the baffle.

In fact, the double-slit interference experiment is mainly to verify the wave-particle duality of light, which is a typical experiment of what we call wave and particle.

Double-slit interferenceSo why do we say this experiment is terrifying? In fact, it was because at the beginning of this experiment, a scientist was thinking, he said that if he emitted photons one by one, instead of scattering them all at once, then these photons would not have a mutual effect, but soon this result shocked himBecause it was found that whether you emitted one by one or all together, its interference pattern still appeared the same, and no one could explain this incredible phenomenon.

But even more terrifying is that a scientist named Merry said that he wanted to install a camera to record the trajectory of the particlesBut unexpectedly, after he added this camera, the particles did not move, and they immediately stopped performing, as if they knew that he had installed a camera. It feels like these photons have thoughts. This phenomenon creeps everyone out and shocks them.

Cameras and until now no one has been able to give a clear explanation as to how this phenomenon happened. And this experiment has also topped the top ten scalp-numbing experiments selected by the scientific community at the beginning of the 21st century. This shows how shocking and strange this experiment was.