What kind of talents should be called doctors?

The word "文" in the Doctor is generated in the Qin Dynasty, which is a good understanding of erudition. In English, Ph. D refers to doctor of philosophy. Philosophy refers to philosophy, which is easy to understand. But what about doctor? I checked the Wikipedia and found that the English doctor was referring to "an expert in a certain field" at the beginning. Its source is the Latin doctor, it means "teacher" or "professor ). Therefore, it should be an expert in the field of philosophy. Philosophy is a deep and difficult to understand, so it became a representative of a diploma of the highest level. Of course, in fact, in the early stages of scientific development, many problems cannot be explained in a scientific way, so people will eventually try to explain everything through philosophy. From this point of view, it is also related to the "Knowledgeable.

 

Now our Chinese doctor refers to a foreign Ph. D. If we leave the relationship with philosophy, we still need to admit that the so-called pH. d. This doctor should be called by a very specialized expert in a certain field. For example, let's look at an extreme example:

 

After several years of hard work, debroyi finally 1924 He completed his doctoral thesis quantum theory research. In this paper, he explains in detail the electronic wave theory he created. This includes, according to Albert Einstein's studies on light waves, and the deduction of the wave-particle binary properties of matter: Any matter has both the volatility and particle properties. Since the subject and content of the paper are quite advanced, Lang zhiwan cannot determine whether there is any defect, so he sent Einstein a copy to seek his opinion. Einstein was very busy at that time and was studying Bose. - Einstein's statistics showed that he could not spare time to read them carefully, but he had to flip it over a little. Immediately, he realized that the paper was very weighty and was willing to endorse the popup image. He was excited to reply: "He has set off the veil "! And sent the papers to the Berlin Emy of sciences, so that this theory is widely known in the physics field [ 1 ]. Debroge earned his coveted doctorate degree. Later, hervin schörörör gained a lot of valuable inspiration from this paper. Since electrons are fluctuating, what is an electronic wave equation? Two years later, schödörör's equation was published, and a new era of quantum mechanics began.

 

Debroge published a paper that could lay the foundation of modern quantum mechanics and then earned his "dream" doctorate. Well, of course, it cannot be said that only such a person can earn a doctorate. However, you can say at least from one side that a doctor or someone else should always think about this direction. Without such a holy territory, God-class people cannot be born in this country-who would like to follow the "brick house" and"Called beast"Confuse?

 

I cannot confirm what is the root cause of Chinese education problems, but at least some phenomena exist. For example, the school will teach things that will never be used for a lifetime, or something that was useful more than a decade ago. If this is the case, forget it-I don't need it, or I can learn it myself. However, some things are wrong, or at least not completely correct, and the whole education and even the environment cannot be questioned and verified.

 

Let's take a literary example: we have learned almost all about "last lesson", Dud's works. This post is written about the French period of the French-French war. It was defeated by France.The azas region is for Germany. Therefore, the protagonists in this article can only teach the last French lesson, and those students will no longer learn their "mother tongue. Beautiful and sad words make people burst into tears. This post, which left me unhappy, was nothing more than 20 years ago. The French-speaking population in the Arthus region accounts for only 5%, and the majority of people are originally German-speaking. I still don't feel this way, so let me explain it. Assume that this post was written by a Japanese, saying that after the defeat of Japan in World War II, the three provinces in the east region were "cutover" for China (of course, I know that is not a cutover, but a return to the embrace of the Motherland ), the hero and the classmates took the last Japanese lesson and said that this was the last lesson. Then the students regretted that they had not learned this before ...... You want to see thisArticleWhat do you feel in your mind, or if such an article is included in Korean primary school textbooks? The knowledge we learned from this article, including geography, history, and humanities, is totally wrong.

 

Here is a physical example: double slit interference experiment. We have done this experiment in high school, and we should have a deep impression. This experiment is used to prove the two-image of light. There was a light source (such as an electric lamp or candle) in the experiment. There was a thin-slit barrier in front of it, and then there was another barrier engraved with two parallel seams, and finally a projection wall. When the light emitted by the light source passes through a single slit or double slit and finally projected onto the wall of the projection, a famous striped interference pattern is formed. Students who have ideas, like me, will have a clear question: why do we need to put a single slit in front of the double slit interference experiment when using a common light source, instead of using a laser? This is the so-called answer on the Internet and also the answer in the textbook:

Http://zhidao.baidu.com/question/49306713.html? Fr = qrl & cid = 984 & Index = 5

Similar problems are not only available to me, for example:

Http://wenwen.soso.com/z/q187653454.htm

Unfortunately, the answer here is similar (it is totally unreasonable here). It is likely to be a problem like what my teacher gave me at the time. Especially when it comes to the role of a single slit, for example,"", Or" Form a line light source ". I have a deep memory. At that time, the teacher said that the result of the dual-slit experiment was the result of the superposition of the light waves passing through the slit and the light waves passing through the B slit. This requires that the phase of the photon passing through the slit in an extreme period of time is the same (or related) as that passing through the B slit ). Due to the disorganized phase of the light produced by a common light source, a single slit is required to generate a point light source (or a line light source), so that the dual slit can generate a striped image. WhileIf it is a laser source, there is no need for a single slit. Because the laser is stimulated, the phase is completely consistent. I forgot whether it was a picture in the book or a picture drawn by the teacher on the blackboard. I spent a few waves representing the light waves. These waves have different phases. At that time, I didn't understand this picture, and I couldn't understand it. Why can a single slit make several phases from a laser source at the same time be different, the phase is the same when a single slit is reached. This seems to confuse me with a plausible explanation.

 

In the past few days, Wikipedia has seen such an entry:

Http://zh.wikipedia.org/zh-cn/quantum force ##material Diffraction

Here, a four-cell cartoon on the right is about the result of a diffraction experiment made by electrons. In this experiment, we used a "dual-slit barrier" and a launch source without a single slit. This experiment is characterized by the fact that only about 10 electrons are transmitted per second on average, so the probability of two electrons being transmitted at the same time is very low, at the same time, the probability of hitting a point and generating a wave is lower. What's amazing is that after a long period of "exposure", we can also get a typical double slit diffraction pattern!

 

The results of such an experiment solve my previous puzzles. First, even only one electron will interfere, which means that one (quantum) electron itself can generate "two waves at the same time through double seams ", and eventually generate "superposition of waves ". In other words, the results of the double slit test are not the phase superposition of one electron and another electron, or one photon and another photon at a certain point! On the contrary, it is the superposition of the waves on each electron or photon passing through two different seams.

 

After this experiment, we can think about the question of "why single slit is required", which becomes simple: if a photon can generate a wave that goes through two double slit at the same time, so why cannot we generate infinite waves that pass through the whole space? In fact, the double slit only blocks the vast majority of waves, leaving only the wave passing of the two seams. If it is a single slit, it is only a slit. If the double slit interference itself does not necessarily relate to the superposition of multiple electrons, then how can we explain the role of a single slit with the phase problem of multiple photon?

 

I thought for myself, the single slit is more likely to be used to avoid waves of different phases in the same photon at other positions on the first barrier plane, necessary shielding is implemented for the overlapping effect of the double slit interference. But why does a common light source have to have a single slit, and the laser does not need it? I haven't fully figured it out yet.

 

As a matter of fact, I have seen more problems, such as how to explain the collapse of the wave function caused by "Observations" in quantum mechanics (Copenhagen interpretation. However, these are some unknown domain problems, which are different from the previous ones.