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#1
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![]() "Dave Platt" wrote ... In article , Szczepan Białek wrote: The TRANSVERSAL magnetic disturbances have beautifull math. The most beauty math element is the displacement current. But the magnetic disturbances are creates by AC CURRENT (not voltage). So if the radio waves are emitted from the current zone of antenna Maxwell is right. If from ends - not. Maxwell admired Ampere. But each genius works out his own theories. We can choose between them. So, the obvious thing for you to do (as the proponent of an alternative, nontraditional theory) is to devise an experiment which can distinguish between these two cases. The traditional theory is the acoustic theory. The nontraditional theory is the Maxwell model. In his model the transverse waves propagate in a solid body. Maxwell devised many experiments. One of them was the famous MM experiment. But Maxwell dead before the result. Remember, that when a responsible scientist proposes a theory, that scientist tries as hard as possible to come up with ways to *dis*prove the theory - that is, experiments which predict a testable result, which differs from the predictions of other theories. Maxwell ended his life at 47. He was responsible but he had not enough time. If the new theory can survive such testing, then it's got some meat on its bones... and choosing it would make sense. If it fails to survive the testing, it's wrong... and choosing it would be mistaken. The teachers choose it. The engineering people choose electrons. If the scientist can't use the theory to make testable predictions, it's useless... and choosing it would be futile. It is the excelent "piece to teach". If all of the predictions of the new theory are indistinguishable from the predictions of prevailing theory, then perhaps it isn't really new.. It may just be a restatement of the prevailing theory in different words... and if so, choosing it would be entirely a matter of taste or preference. Maxwell theory was really new. If the scientist won't even *try* to use the theory to make testable predictions which might prove the theory wrong, then s/he isn't a scientist. Maxwell had not enough time to do it. So... how would *you* construct and measure an antenna (and perhaps modify it and then measure again), in order to demonstrate that your theory predicts the actual behavior of the antenna better than the standard theory? Standard theory is the acoustic theory. All YOUR antennas demonstrate that the acoustic analogy is O.K. Here's a suggestion: start out with a model of a straight half-wave dipole. Predict its radiation pattern and feedpoint impedance, based on Maxwell's current-based theory and on your own voltage-at-the-end theory. Measure the pattern and impedance. I am here to encourage you all to do it. Now, "bend" the antenna into different shapes. For example - leave the center portion of the dipole in a straight line. Bend the ends in various directions, shaping the antenna into a U, or into a Z, or a C (with the tips close together but not touching). Shorten the center section and split the ends, forming an H (e.g. short radiator with capacity loads on each end). In each case, predict the pattern and feedpoint impedance based on Maxwell's theory and on your own. Can you find cases in which the predictions vary? If so, which matches the actual (measured) behavior of the antenna better? I am sure that somebody young do it. Maxwell would be happy. Mathematical beauty is great... but if it doesn't predict the actual behavior of real-world phenomena, it's just beautiful math. Math is still necessary in schools. But in this case the math will be saved. The Maxwell equations were the same like the Helmholtz for the fluid mechanics. Now the same math is taught in the two subjects (fluids and EM). Very often the same teacher do it. S* |
#2
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![]() "Szczepan Bialek" wrote in message ... "Dave Platt" wrote ... In article , Szczepan Białek wrote: The TRANSVERSAL magnetic disturbances have beautifull math. The most beauty math element is the displacement current. But the magnetic disturbances are creates by AC CURRENT (not voltage). So if the radio waves are emitted from the current zone of antenna Maxwell is right. If from ends - not. Maxwell admired Ampere. But each genius works out his own theories. We can choose between them. So, the obvious thing for you to do (as the proponent of an alternative, nontraditional theory) is to devise an experiment which can distinguish between these two cases. The traditional theory is the acoustic theory. The nontraditional theory is the Maxwell model. only if you are still living in the 1800's. |
#3
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![]() "Dave" wrote ... "Szczepan Bialek" wrote in message ... "Dave Platt" wrote ... In article , Szczepan Białek wrote: The TRANSVERSAL magnetic disturbances have beautifull math. The most beauty math element is the displacement current. But the magnetic disturbances are creates by AC CURRENT (not voltage). So if the radio waves are emitted from the current zone of antenna Maxwell is right. If from ends - not. Maxwell admired Ampere. But each genius works out his own theories. We can choose between them. So, the obvious thing for you to do (as the proponent of an alternative, nontraditional theory) is to devise an experiment which can distinguish between these two cases. The traditional theory is the acoustic theory. The nontraditional theory is the Maxwell model. only if you are still living in the 1800's. Exactly in 1638: "1638 - Rene Descartes theorizes that light is a pressure wave through the second of his three types of matter of which the universe is made. He invents properties of this fluid that make it possible to calculate the reflection and refraction of light. The ``modern'' notion of the aether is born. " From: http://maxwell.byu.edu/~spencerr/phys442/node4.html The next: "1717 - Newton shows that the ``two-ness'' of double refraction clearly rules out light being aether waves. (All aether wave theories were sound-like, so Newton was right; longitudinal waves can't be polarized.) " In the History you find how many people analysed the issue: longitudinal vs. transversal. In 1905 all stop. But after 1905 peole build antennas. And they do not worry what the radiation is like. Sunner or later the issue appears again. S* |
#4
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![]() "Szczepan Bialek" wrote in message ... "Dave" wrote ... "Szczepan Bialek" wrote in message ... "Dave Platt" wrote ... In article , Szczepan Białek wrote: The TRANSVERSAL magnetic disturbances have beautifull math. The most beauty math element is the displacement current. But the magnetic disturbances are creates by AC CURRENT (not voltage). So if the radio waves are emitted from the current zone of antenna Maxwell is right. If from ends - not. Maxwell admired Ampere. But each genius works out his own theories. We can choose between them. So, the obvious thing for you to do (as the proponent of an alternative, nontraditional theory) is to devise an experiment which can distinguish between these two cases. The traditional theory is the acoustic theory. The nontraditional theory is the Maxwell model. only if you are still living in the 1800's. Exactly in 1638: "1638 - Rene Descartes theorizes that light is a pressure wave through the second of his three types of matter of which the universe is made. He invents properties of this fluid that make it possible to calculate the reflection and refraction of light. The ``modern'' notion of the aether is born. " From: http://maxwell.byu.edu/~spencerr/phys442/node4.html The next: "1717 - Newton shows that the ``two-ness'' of double refraction clearly rules out light being aether waves. (All aether wave theories were sound-like, so Newton was right; longitudinal waves can't be polarized.) " In the History you find how many people analysed the issue: longitudinal vs. transversal. In 1905 all stop. But after 1905 peole build antennas. And they do not worry what the radiation is like. Sunner or later the issue appears again. S* only when time travelers bring back scientists from the 1800's... or people like you try to reinvent the discarded theories of old. |
#5
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![]() "Dave" wrote ... "Szczepan Bialek" wrote in message ... In the History you find how many people analysed the issue: longitudinal vs. transversal. In 1905 all stop. But after 1905 peole build antennas. And they do not worry what the radiation is like. Sunner or later the issue appears again. S* only when time travelers bring back scientists from the 1800's... or people like you try to reinvent the discarded theories of old. Some theories are taught some not. But people after 25 can use what they want. It seems to me that engineering people do not use the EM theory. S* |
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