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| The text below contains my findings which may be of interest to people who have inquisitive minds and want to discover how Nature really works. (This text is taken from my book "Foundational Flaws in Modern Physics", which can be found at [Only registered users see links. ]) CONCLUSIONS As is explained in §5.8 ([Only registered users see links. ]) and in §2.1.3 ([Only registered users see links. ]), modern experiments leave no doubt that the scalar potential is the most fundamental concept describing gravitational fields. Einstein introduced tensors because they made his equations covariant. As J. D. North pointed out, "...Einstein sought to preserve the tensorial nature of his field law in order to preserve its general covariance" (North: [R#1] p.87). Tensors have this property due to the fact that their components are vectors. However, due to the same property of tensors, predictions of gravitational retardation of clocks in cases where more than one field is acting are incorrect. So we can no longer claim that gravitational fields are of tensorial character. Obviously, experimental evidence for this was not available in Einstein's times. Moreover, as is pointed out in my book in section 2.1 ([Only registered users see links. ]), it seems that Einstein didn't believe that gravitational fields can really be made disappear by transforming them away, as many modern relativists seem to believe. It looks that for Einstein - tensors were just convenient technical tools for the covariant and phenomenological description of gravitational fields. As was already mentioned, Einstein didn't introduce them because of evidence indicating that gravitational fields are tensor fields. Concerning the history of introduction of tensors by Einstein - John Stachel, who is no doubt an expert on the history of Einstein's theories, wrote that In trying to trace Einstein's journey from the special to the general theory, the fol- lowing difficulty presents itself. In the papers up to and including those published in 1912, there is no mention of the need for a nonflat spacetime, much less of the metric tensor as mathematical representation of the gravitational field. Yet the first paper of 1913 presents us with a full-fledged argument for the representation of the gravitational field by g_mu_nu together with the development of four-dimensional tensor analysis on a Riemannian manifold, the Riemann tensor, etc. (Stachel: [R#2] p.56) Everything seems to indicate that it was only the mathematical necessity which motivated Einstein to use tensors and the four-dimensional tensor analysis on a Riemannian manifold. Moreover, Einstein employed the four-dimensional tensors as mathematical representations of gravitational fields in his phenomenological theory. This fact seems to have escaped notice of most physicists and they understood these four-dimensional representations or descriptions as explanations. Soon some started claiming, as Cornelius Lanczos, that "If we understand the proper geometrical structure of the world, we also understand its physical structure, because: physics is geometry" (Lanczos: [R#3] p.95). As is pointed out in §1.3.6 ([Only registered users see links. ]), Einstein made clear that this was not his understanding of general relativity; but, unfortunately, it did not help much. The commonly used geometric visualizations made an impression that they actually are four-dimensional explanations of the processes and interactions of Nature. Due to this confusion Einstein's principle theories were taken as explanatory theories - even though Einstein never claimed that they were. Einstein's point of view has been ignored and the phenomenological descriptions are now considered as explanations. Moreover, we consider these descriptions and the concepts which they use as real objects, in other words as observables. In his book - The Creation of Matter - Harald Fritzsch wrote that The scientific method of exploration concerns the creation of appropriate concepts to describe natural phenomena and the establishment of connections between these phenomena. We feel our way along this "road of ideas," along chains of causality. We open up reality by attempting to construct a logical "road network" free of contradictions, one which we then clap on to reality. I have cautioned the reader against confusing the network of scientific concepts - our picture of reality - with the real world. Many of the mistakes and much of the tragically flawed reasoning of our time are based on just this fallacy. (Fritzsch: [R#4] p.276) Indeed this confusion of our picture of reality with the real world is what has happened in the case of Einstein's theories. This has happened because we did not 'feel our way along this "road of ideas," along chains of causality.' Ignoring causality considerations and relying on mathematics as a primary guide - is the biggest problem of modern physics. It is correct to say that a body gets hotter when its temperature gets higher. But will the temperature of a cold apple rise - when we lift the apple? No, because the value of the temperature has nothing to do with height. We may draw graphs on which time is depicted graphically as a dimension, but this will not make time a dimension. Geometry is part of mathematics and it can and needs to be used in physics, but it is not physics as some seem to imagine. We may use non-Euclidean geometry, but we cannot say that this geometry is responsible for light being bent; geometry provides only a description and not a cause or an explanation of why things happen. As we've seen geometry cannot explain why the time delay of light (see §4.5 [Only registered users see links. ]) and the clock retardation take place and, therefore, it cannot be considered as an explanation of gravitational effects. It is clear from the article of D. M. Greenberger and A. W. Overhauser that spacetime geometry is inadequate for describing or predicting the outcome of their experiment. In fact, as they noted, "...it turns out that the result of the COW experiment is incompatible with the geometrical, weak equivalence principle..." (Greenberger & Overhauser: [R#5] p.74). Yet, this is ignored by adherents of constructively interpreted general relativity. As G. Z. Adunas with his colleagues wrote: "However, there is more than one aspect of quantum mechanical structure that requires a deeper study in the context of gravity. This has been made abundantly clear in recent years" (Adunas et al.: [R#6] p.192-3). One must agree with this. And let's hope that this study is not only "deeper" but also without preconceptions; because only then we can learn what gravity really is. As is pointed out in §4.3 ([Only registered users see links. ]), in the period from 1928 to 1932 - Einstein was busy working on theories of gravitation in flat spacetime. This of course means that he did not believe that the spacetime curvature explained gravitation. And he was right; it does not. As is demonstrated in §4.2 ([Only registered users see links. ]), the assumption - that the gravitational clock retardation is caused or explained by spacetime curvature - leads to incorrect predictions. As is pointed out in §4.5 ([Only registered users see links. ]), the results of the time delay of light experiments can't be explained by spacetime curvature. In fact, these experiments prove that properties of space are affected by gravitational fields. But when we take this fact into account, we are compelled to conclude that the observed bending of light proves that space is not curved (as is explained in more details in section 4.4 [Only registered users see links. ]). As is pointed out in §4.6 ([Only registered users see links. ]), the belief - that spacetime curvature explains gravitational attraction - is incorrect. As is explained in chapter 3, the assumption - that time is the fourth dimension - leads to contradictions with evidence and paradoxes. Hence, spacetime can only be considered as a mathematical concept. Einstein's Equivalence Principle (EP) has led to many discoveries (like gravitational redshift, etc.). So there is no doubt that it has contributed to the progress of physics. But because we have failed to appreciate that EP is only a part of a phenomenological theory - it led us to erroneous understanding of gravitation. Our misconceptions, which resulted mainly due to interpreting EP constructively, are of fundamental importance. We not only did not understand the difference between the effects of gravitation and effects of motion, but we did not even suspect that there was any. We thought that gravitational red-shift was a velocity effect and we did not even suspect that this is actually a quantum/gravity effect. Due to the Equivalence Principle (EP) and in conjunction with ignoring causality considerations, we very often consider coordinate effects as physical effects and vice versa. In any case, it is evident from our previous discussions that EP cannot help us in developing a constructive unified theory. Its main tenet, that for a freely falling observer gravity doesn't exist, is only about phenomenology and not about how Nature works. As Albrecht Fölsing reported: More generally, Einstein did not approve of Heisenberg's talking about "what one knows about nature, instead of what nature really does. The physical sciences can only concern themselves with what nature really does." (Fölsing: [R#7] p.581) We must agree with Einstein on this. From a multitude of experiments, we know what Nature does in free fall. Physics must concern itself with these phenomena. We must stop claiming, that some effects don't take place, if the only basis for it is "what one knows about nature" - in cases in which one's abilities to know are restricted. This way, we disregard how Nature works and base our considerations only on one's knowledge of something which one is prevented from knowing; and this is nonsense. Let us realize that EP is not about "what nature really does". So even though EP was once inspiring and helpful, right now it only confuses people. It implies that there is equivalence between coordinate and physical effects, between effects of gravitation and effects of motion, etc. - but modern experimental evidence disproves this. The fact that EP is not a law of Nature - tells us that there is no relativity of acceleration; which means that the general relativity principle is untenable. More and more people realize that, in the quest for unified physics, we must try to get rid of our preconceptions and prejudices. As Roland Omn|1es wrote: During the conception stage, the method is free to consider all hypotheses, even the most far-fetched, in order to mimic Reality. Everything can be tried, a bold abstraction of something that has succeeded elsewhere, the exploration of the faintest clue... (Omn|1es: [R#8] p.268) It is sad to say but in the case of "the exploration of the faintest clue", we seem to fail miserably. We not only missed many of the clues which can tell us something about the future unified physics, but we sometimes seem to be trying to make these clues invisible for future physicists. Take for example the case of photons climbing up or going down in a gravitational field. Many physicist seem to imply that it makes no difference whether the energy and frequency of these photons changes or not. But if we take into consideration what was discussed in §5.5 ([Only registered users see links. ]), this would also have to mean that it makes no difference whether a particle falling in a gravitational field gains energy from the field or not. What kind of physics is this? On one hand, to make the rest masses of bodies independent of the gravitational potential, we would have to assume that their gain in kinetic energy comes from the gravitational field which accelerates them. However, this leads to the conclusion that a free-falling particle (or a photon) gains infinite energy when it falls into a black hole. And this is in contradiction to the conservation laws. On the other hand, if one admits the variability of rest mass (depending on gravitational potential) - the energy transfer and gravitons are not needed. The problem is that the concept of gravitational potential, as necessary for the description of natural phenomena, does not fit well to GR. As Max Born wrote: "...the Newtonian notion of potential energy is alien to Einstein's theory..." (Born: [R#9] p.354). However, as has been pointed out in chapter 5, without the use of gravitational potential energy - it is impossible to explain some evidence which involves gravitational phenomena. And as was mentioned above, the assumption of the independence of rest masses from gravitational potential leads to contradictions with the laws of conservation of energy and momentum. We must also realize that the explanation of gravitational attraction as an action mediated by gravitons - is untenable. It is in contradiction with the conservation laws, as is explained on p.87 ([Only registered users see links. ]) and 88. Moreover, it is time to stop implying that inertia of bodies originates from other masses. If this were the case - inertia of a body would be increasing as it approaches other bodies. Hence, we would have to assume that either the mass-energy of this body is not proportional to its inertia, or that the law of conservation of energy is contradicted. As was explained in §2.3.4 ([Only registered users see links. ]), the assumption - that inertial effects arise as a result of forces induced by apparently accelerating masses of the universe - is also untenable. We must finally realize that general relativity is only a phenomenological theory and that its applicability and validity have limits. As was pointed out, the causal effects of motion (which we observe) prove that there is some background space; no matter how it originates, or how we call it: space, background, field, ether or whatever else. Moreover, this background space has physical properties; and as we know, it's these properties which dictate the speed of light. From the change of the speed of light we know that these properties are affected by the presence of mass-energy. And it's not only matter which affects space properties. As we discussed, change of these properties in turn affects matter: it results in the change of rest masses of particles. Hence it seems that properties of space also have a say about how much energy is needed to create a given particle. The electrostatic field of a charged particle contains energy, which constitutes part of the mass of the particle. How can the energy of the field of an invariant charge be changed? As far as we know this can happen only when index of refraction of space, where the charge is, is changed. This also implies the variable coordinate speed of light; which is mentioned above. And this leads to the explanation of the bending of light and the time delay of light experiments. Change of index of refraction of space must affect resonant frequencies of EM antennas and also resonant frequencies of atoms and molecules, which we observe and call the gravitational redshift (or clock retardation). And properties of space affect not only the coordinate speed of light but also coordinate speeds of matter waves. This explains why Newton's theory, which did not take this into account, was not able to precisely predict the motion of rays of light or of Mercury. So - as is evident - appreciating that space has physical properties leads to explanations of many phenomena. Even if the origin of this background space could be questioned, its existence is evident and undeniable. I do not believe that we can ever understand how Nature works, if we don't acknowledge the existence of space as a physically and causally active entity. Imagine a man who believes that the air has no weight, because otherwise it would drop down. Do you think that such a man can figure out why a balloon stays up in the air? He may come up with some theories or hypotheses but can anyone of them really help him understand why the balloon hovers above in the sky? As we know if one added more (imaginary) epicycles to Ptolemy's system, it would become more accurate in predicting the positions of planets and other celestial bodies. But would it help us understand better how gravitation works? I don't think so. Ptolemy's system was also progress at some point in history; it allowed predictions of positions of heavenly bodies. Evidently, the ability to make predictions is not everything and it does not prove that the concepts, which a given theory uses for making these predictions, represent physical reality. Richard P. Feynman wrote that There was a time when the newspapers said that only twelve men understood the theory of relativity. I do not believe there ever was such a time. There might have been a time when only one man did, because he was the only guy who caught on, before he wrote his paper. But after people read the paper a lot of people understood the theory of relativity in some way or other, certainly more than twelve. On the other hand, I think I can safely say that nobody understands quantum mechanics. (Feynman: [R#10] p.129) It is time to stop putting up with understanding relativity "in some way or other". As we have seen, the misunderstanding of special relativity led to adopting a point particle model of elementary particles in quantum electrodynamics and then in quantum field theory. In result structures of particles are not studied. It is also due to our misunderstanding of relativity that properties of space are not investigated and not taken into consideration. This in turn makes it impossible for us to understand quantum properties of matter and quantum effects in general. Clearly, if we really want to ever understand quantum mechanics, we need to understand Einstein's relativity properly (in Einstein's way). We must realize that it is a principle theory and not a constructive one; which means that it is not an explanatory theory (see §1.2.1 [Only registered users see links. ]). It can't explain such physical effects of motion as the retardation of moving clocks. It can't explain inertial effects. And it cannot explain the value of the speed of light. The above phenomena can be explained only by a theory in which space is considered as a physical entity with properties, but such space cannot be incorporated into Einstein's theory. So his relativity theory can never be changed into a constructive/explanatory theory. To explain the above mentioned phenomena, we need a theory like that of Lorentz and Poincaré. The relativity principle (RP) for that theory was enunciated by Poincaré in 1904. It had different interpretation than Einstein's relativity principle. Moreover, as Charles Scribner, Jr noted: Poincaré's adoption of the principle of relativity seems now to have been provisional or incomplete in three respects. First, although Poincaré was ready to postulate the exact validity of the principle with respect to all physical laws, he was troubled by the possible exception presented by gravitational phenomena. (Scribner: [R#11] p.675) As is explained in §1.12.4 ([Only registered users see links. ]), gravitation indeed defies the relativity principle (RP). So RP can't be considered as a general law of Nature, as it has been up to now. And although one could say that within the realm of special relativity - relative motion is the only meaningful motion, we must realize that we cannot say that this is true in physics in general. This only appears to be true due to compensatory effects; exactly as Poincaré hypothesized. However, this appears to be true - only when gravitational effects are not involved. In his book, Superstrings and the Search for the Theory of Everything, F. David Peat wrote that: "The time may have come for physics to ask some deep questions, for concealed in one of these may well be the theory of the twenty-first century" (Peat: [R#12] p.338). Indeed the state of physics of the twenty-first century depends on whether we want to seriously ask ourselves: Is our reality really four-dimensional? Is time really a dimension? Is space just an empty void without properties? Are there no dynamical/causal effects of motion? Are elementary particles dimensionless and structureless points? Is a static field just a hail of points or degrees of freedom endlessly emitted by its source? As has been shown in this book, experimental evidence indicates that the above questions must be answered in the negative. However, this means that we have to radically change the way we view, understand and interpret reality. And we don't need a new Einstein this time. We only need to have a sober and unprejudiced look at all experimental evidence. Some of us may be afraid of changes and prefer status quo. But the changes in our understanding of reality will take place sooner or later (even if many choose to hide their head in the sand). The only question is: When will this happen? The answer to this last question does not depend on me, it depends on you dear reader. It is believed by many prominent physicists that a new revolution in physics is coming. My hope is that by bringing these questions and issues to your attention - I helped you realise what kind of revolution it's going to be. I also hope that this in turn helps you to take part in this revolution. REFERENCES: [R#1] J. D. North - "The Measure of the Universe - A History of Modern Cosmology" - Clarendon Press - Oxford - 1965. [R#2] Editors: Don Howard and John Stachel - "Einstein and the History of General Relativity" - Birkh|auser - Boston · Basel · Berlin - 1989. [R#3] Cornelius Lanczos - "The Einstein Decade (1905 - 1915)" - Elek Science - London - 1974. [R#4] Harald Fritzsch - "The Creation of Matter" - Basic Books, Inc., Publishers - New York - 1984. [R#5] Daniel M. Greenberger and Albert W. Overhauser - "The Role of Gravity in Quantum Theory" - Scientific American 242, May (1980), p. 66. [R#6] G. Z. Adunas, E. Rodriguez-Milla, and D. V. Ahluwalia - "Probing Quantum Violations of the Equivalence Principle" - General Relativity and Gravitation Vol. 33 No. 2, 2001, p.183. [R#7] Albrecht Fölsing - "Albert Einstein" - Viking Penguin, a division of Penguin Books USA Inc. - 1997. [R#8] Roland Omn|1es - "Quantum Philosophy" - Princeton University Press - Princeton, New Jersey - 1999. [R#9] Max Born - "Einstein's Theory of Relativity" - Dover Publications, Inc. - New York, NY - 1965. [R#10] Richard P. Feynman - "The Character of Physical Law"" - MIT Press - Cambridge, MA - 1967. [R#11] Charles Scribner, Jr. - "Henri Poincaré and the Principle of Relativity" - American Journal of Physics 32 (1964), p. 672. [R#12] F. David Peat - "Superstrings and the Search for the Theory of Everything" - Contemporary Books - Chicago · New York - 1988. J. M. Góral (Gooral) |
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