Julius Rosani
As promised in the last article I read the book Einstein and Infeld. I must say that before starting I thought would be the usual book about physics, explained clearly, but maybe not easy, given the importance of the topic. Factor also uninviting to read were the mathematical formulas that would have appeared. Physics is an exact science and as a result of any such each experiment must be approximated by a mathematical function. Well, now that I finished reading I can reassure anyone who wants to read this fantastic book on physics: understanding of what is said is not impossible and mathematical formulas is not even the shadow. Already in the preface, the authors provide not want to make use of mathematics and to have the sole purpose of clarifying certain aspects of physics still unknown to many. The only requirement that the reader should have a continuing two physicists in the preface, is to have good will and willingness to understand the arguments made in the various chapters.
The book is divided into four parts:
Part One: The Rise mechanistic interpretation
The book opens by comparing the physics of a perfect thriller, where you can not jump to the last pages to find out who is the murderess. The research is based on physical assumptions and the search for evidence in favor of them. So the first thing to do is to observe and interpret. Through this process we arrive at the first sign, from which we construct a theory. Please note, the evidence does not always lead to the correct theory only because it was discovered.
After this introduction presents the carriers, the concept of motion, mass, physical size left on the sidelines for long. With these concepts could spell out a mechanistic theory of reality, namely that the world is "moving" because of the forces acting on the matter, the only component of reality. It is described as short, based on knowledge of factors such as speed and position, we can predict the future position of the particle being studied.
Part Two: Loss mechanistic interpretation
This section describes the theory behind electromagnetism and thermodynamics. Still trying to adapt the idea to the scope of mechanistic study, but one begins to realize that there are some problems, especially with the study of light. Since it propagates in a vacuum, you can not deal with a wave, since it would need to spread the field. The wave is nothing but a change of state of matter. The sound is because there is air vibrating in a vacuum there is no sound. Many experiments, however, show that the light must be like a wave, or some of his behavior could not explain. (Will not go into details because the matter would become quite complicated.) Ether is invented then, but in this case its definition is cumbersome and not well defined. The mechanistic conception thus enters into crisis.
Part Three: Field, Relativity
is introduced the concept of field, which exerts forces on particelle.Tutto what has already talked about it before it is read by introducing the field (described in my article of December 2009). It finally comes to the theory of relativity. I would also not well in this area except for two important points. The first is that according to relativity, two frames of reference in motion relative to each other at near the speed of light can have "time" different. In fact, if we place two clocks in the two systems, we see that the time marked by the two is different once the two systems are in motion, despite the two clocks have been previously synchronized. This takes us back to the previous article in which Lee Smolin, which decreed that the passage of time is the same for every point in the universe, be it running or not. I can not tell who is right, but it's getting interesting. The second point is the mass-energy, mass and energy that binds precisely to a single "substance". According to this theory the mass is a condensed high-energy, and energy is a fraction of the mass. Basically a hot body weighs more than when it is cold, but the weight change is infinitesimal. The same is true of a moving body from its resting state.
Part Four: How many
Of this last part I would anticipate a minimum. I'm just saying that the idea of \u200b\u200bknowing the position, speed and trajectory future with known data permanently withdrawn. In this case, either you know the position or velocity or trajectory, but never all together. In addition, more than the precise location you know where probable. Same thing for speed and trajectory. (We are talking about elementary particles in motion.)
I know that he was shallow in the exposition, but what Einstein and Infeld are summarized in 273 pages, do not think I can play in two . I therefore invite anyone interested to read the book and continue to learn about this beautiful area. The title is "The evolution of physics" and is well worth a read.
As promised in the last article I read the book Einstein and Infeld. I must say that before starting I thought would be the usual book about physics, explained clearly, but maybe not easy, given the importance of the topic. Factor also uninviting to read were the mathematical formulas that would have appeared. Physics is an exact science and as a result of any such each experiment must be approximated by a mathematical function. Well, now that I finished reading I can reassure anyone who wants to read this fantastic book on physics: understanding of what is said is not impossible and mathematical formulas is not even the shadow. Already in the preface, the authors provide not want to make use of mathematics and to have the sole purpose of clarifying certain aspects of physics still unknown to many. The only requirement that the reader should have a continuing two physicists in the preface, is to have good will and willingness to understand the arguments made in the various chapters.
The book is divided into four parts:
Part One: The Rise mechanistic interpretation
The book opens by comparing the physics of a perfect thriller, where you can not jump to the last pages to find out who is the murderess. The research is based on physical assumptions and the search for evidence in favor of them. So the first thing to do is to observe and interpret. Through this process we arrive at the first sign, from which we construct a theory. Please note, the evidence does not always lead to the correct theory only because it was discovered.
After this introduction presents the carriers, the concept of motion, mass, physical size left on the sidelines for long. With these concepts could spell out a mechanistic theory of reality, namely that the world is "moving" because of the forces acting on the matter, the only component of reality. It is described as short, based on knowledge of factors such as speed and position, we can predict the future position of the particle being studied.
Part Two: Loss mechanistic interpretation
This section describes the theory behind electromagnetism and thermodynamics. Still trying to adapt the idea to the scope of mechanistic study, but one begins to realize that there are some problems, especially with the study of light. Since it propagates in a vacuum, you can not deal with a wave, since it would need to spread the field. The wave is nothing but a change of state of matter. The sound is because there is air vibrating in a vacuum there is no sound. Many experiments, however, show that the light must be like a wave, or some of his behavior could not explain. (Will not go into details because the matter would become quite complicated.) Ether is invented then, but in this case its definition is cumbersome and not well defined. The mechanistic conception thus enters into crisis.
Part Three: Field, Relativity
is introduced the concept of field, which exerts forces on particelle.Tutto what has already talked about it before it is read by introducing the field (described in my article of December 2009). It finally comes to the theory of relativity. I would also not well in this area except for two important points. The first is that according to relativity, two frames of reference in motion relative to each other at near the speed of light can have "time" different. In fact, if we place two clocks in the two systems, we see that the time marked by the two is different once the two systems are in motion, despite the two clocks have been previously synchronized. This takes us back to the previous article in which Lee Smolin, which decreed that the passage of time is the same for every point in the universe, be it running or not. I can not tell who is right, but it's getting interesting. The second point is the mass-energy, mass and energy that binds precisely to a single "substance". According to this theory the mass is a condensed high-energy, and energy is a fraction of the mass. Basically a hot body weighs more than when it is cold, but the weight change is infinitesimal. The same is true of a moving body from its resting state.
Part Four: How many
Of this last part I would anticipate a minimum. I'm just saying that the idea of \u200b\u200bknowing the position, speed and trajectory future with known data permanently withdrawn. In this case, either you know the position or velocity or trajectory, but never all together. In addition, more than the precise location you know where probable. Same thing for speed and trajectory. (We are talking about elementary particles in motion.)
I know that he was shallow in the exposition, but what Einstein and Infeld are summarized in 273 pages, do not think I can play in two . I therefore invite anyone interested to read the book and continue to learn about this beautiful area. The title is "The evolution of physics" and is well worth a read.
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