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harry wrote:
"John Kennaugh" wrote in message Sent: Friday, April 25, 2008 6:52 PM Authors trying to sell Relativity to a student have a problem. They cannot go through a logical sequence of historical events - the history of relativity is quite frankly embarrassing. Neither can they appeal to common sense, relativity is of course counter intuitive. Some text books use semantic trickery. The most honest I have seen is an on-line Harvard university text book where the author says in effect "it may seem daft but it works". I would point out however that the same could be said of the geocentric theory of the solar system. A dominant belief that the earth was at the centre forced the maths to be transformed in such a way that they gave the right answer. It is true that the historical development is often insufficiently explained or even camouflaged as a result of intellectual dishonesty (not necessarily due to the authors themselves). But since you know that SRT was a logical development from ether theory, I find it strange that you make such comparisons - except if you really forgot most of the historical development! Note: such forgetfulness may easily look like dishonesty on your part... I don't see your point. SRT was indeed developed from aether theory and I clearly present the reasoning used. It is in my view flawed because it totally ignored the particulate nature of light. The process is further compromised by the later arbitrary rejection of the aether by relativists which in my view is the intellectual equivalent of sawing off the branch you are sitting on and I believe compromised the integrity of Physics. I believe that physical interpretation or at least causality is an essential part of good physics. Physical changes need physical causes. Again my personal view is that light cannot be both waves and particles and that the most promising approach is to accept that light is made up of photons and try and come up with a model of a photon which would explain the very convincing wavelike behaviour of light. I do not have a problem with people who still believe in the aether. I don't think they are right but they are intellectually more honest then relativists who believe a whole host of untenable myths starting with the one that SR is a different theory to LET, and that Einstein came up with a theory which didn't require the aether. "If the Lord Almighty had consulted me before embarking on creation I should have recommended something simpler." Alfonso 'the wise' of Castile (1221-1284) having studied the Ptolemaic system. As I will explain later I see parallels in the history of relativity where I will show that a dominant belief played a part in distorting our way of viewing things. If you are a follower of Occam then the MMX shows that the speed of light is not constant w.r.t the aether as had been supposed No, that is mistaken. Perhaps some followers of Occam would think so, but others not - it depends on if one regards only a single issue or the total predictive strength of a theory. I would agree that Lorentz was totally justified in trying to find a fix. The wave in aether theory was very convincing and ticked all the boxes apart from this one experiment. By the time you get to Einstein the wave in aether theory had a much more devastating challenge via the ultraviolet catastrophe, Planck and the photoelectric effect. The latter cannot be explained if light is waves only if it is particulate. In that context if you revisit the MMX then it was the first experiment devised which could clearly distinguish between the two theories of light which had dominated physics for two centuries and its result is as predicted by the "light is something which travels from source to destination" school of thought rather than the "light is a wave propagating in a medium" school of thought. I agree that the wave theory is very convincing up to a point but having reached that point I feel one has to accept that light IS made up of particles although it BEHAVES like a system of waves. and so must therefore be constant w.r.t the source - there being no plausible causality by which 'where it ended up' could be responsible for the speed at which it travelled to get there. And what would cause all radiation to be the same speed relative to the source? What causes an electron to always have the same mass. Something fundamental to nature. A cannon ball's speed depends on the energy of its emission. OK but contrary to modern physics belief - which stems from SR - a photon clearly has mass. Its energy increases if it falls under gravity, it loses energy if it escapes from a gravity field, it has momentum, it is deflected if it passes a massive object etc. "if it looks like a duck walks like a duck, quacks like a duck..." The only thing which says it can't have mass is SR. Waldron did the calculations and concluded that a photons mass comes from the following expression: hf = mv^2/2 + mc^2/2 kinetic internal energy energy (rotational) For a stationary source v = c and hf = mc^2 or m = hf/c^2 Using this value the maths works out just as if a photon is a perfectly ordinary particle. Your analogy therefore requires a modification in that if you double the charge you put in the cannon you also double the weight of the cannon ball so the muzzle velocity remains the same. Ritz's emission theory of light published in 1908 and Waldron's Ballistic theory of light published in 1977 are both based on the assumption that the speed of light is source dependent. Both theories were suppressed, not by any act of censorship but by totally ignoring them - which is much more effective. The reason for ignoring them was probably that the Electromagnetic theory of Maxwell as further developed by others upto the point of SRT was so successful that it seemed unlikely that another theory would be as good or even better. Yes it was developed particularly by Lorentz and it was very convincing but nevertheless flawed. You cannot explain the photoelectric effect if light is waves. So light cannot be waves. The direction of physics was in my view changed by the premature death of Ritz 1n 1909 one year after publishing his theory which left Einstein without opposition. I believe that a strong opposition is necessary for good debate and whatever the outcome physics would be better had the opposition not died. My suggestion is that the ballistic theory is based on a correct concept and what the Lorentz transforms do is transform a wrong concept ( the basis of SR) in such a way as to give the correct answer. It shares with the geocentric theory the fact that though mathematically adequate it is impossible to ascribe to it a physical description of the physical processes described by the maths, i.e. a causal description of what is going on. You appear to have forgotten that the LT were originally based on an ether model, and next shown to follow necessarily if one assumes the POR and source independence. Not at all. Source independence is a physical property of the aether. No one around here believes in the aether so why should they believe in a theory which assumes source independence. The answer would appear to be that they accepted the theory and then stopped believing in what it is based upon and didn't like to accept they were wrong so redefined physics. Logically the success of SR would indicate the existence of the aether. One of the myths of SR is that the aether was assumed not to exist because it is undetectable. This isn't true. According to Maxwell there are two predictions relating to the aether which are testable. 1/ That the speed of light varies with the speed of an observer relative to the aether - shown not to be true by the MMX 2/ That because the speed of light is controlled by the aether the motion of the source does not affect it. Relativists - who vehemently deny the existence of the aether claim that experiments demonstrate source independence. I find such experiments less than totally convincing but if they were convincing they would have detected the aether. It is only our speed relative to the aether which is undetectable, the aether itself can be detected by showing source independence. Basically if there is no aether a source is surrounded by nothing which can take part in a physical process so the only physical process which can be responsible for the speed at which light travels is the source. The following experiments demonstrate how my suspicion arose. ---------------------------------------------------------------------- _________________________ train [____________X____________] --v | | | | T T' Imagine you have a train with a laser mounted at right angles at X. Suppose it fires a very short burst of light, triggered by a switch on the track when X is exactly opposite distant target T. [snip details] I will have to ask the help of a relativist on this one but I assume - but don't know for certain - that SR says that what is a right angle in the FoR of the train is transformed in the FoR of the target to an angle such that SR says that it hits T' because in the FoR of the target the laser was pointing at T' and not at right angles to the train. Maybe someone can confirm that. If so then this change of angle is not the result of any identified physical process, there is no physical explanation. Wrong - it follows directly from classical wave theory, taking into account length contraction. If you believe in Lorentz's aether I agree but modern relativists say there is no aether so there is nothing physical which can take part in a physical process. Thus there is no identifiable physical process consistent with modern physics dogma. It simply *has* to be so in order to get the right answer - in order to get the same answer ballistic theory gives. The "right answer" is the basic assumption that the PoR holds... The PoR is totally consistent with ballistic theory. Einstein himself said that the second postulate of SR was 'apparently irreconcilable with the PoR'". With SR he had to ditch 3 long standing and apparently sensible axioms of physics to reconcile the second postulate with the PoR (the first). Ballistic theory requires no such distortion of reality. It quite naturally fits in with the PoR. Ballistic theory also has a full physical explanation of what is going on. An important point here is that ANY experiment viewed from the FoR of the source must have the same outcome for both theories as both theories state that in the FoR of the source light travels at c w.r.t the source. Sigh... Wrong again! In SRT, the light from the source travels at a speed that is "INDEPENDENT of the state of motion of the emitting body". My statement was correct. In SR in the FoR of the source light travels at c w.r.t the source. In Ballistic theory in the FoR of the source light travels at c w.r.t the source. SR says that the speed of light is c w.r.t the observer observing it so if that observer is stationary w.r.t the source it is also c w.r.t the source. Ballistic theory say that it separates from the source at c in all FoR. In the FoR of the source i.e. for an observer stationary w.r.t the source both agree. BTW this is now a fact of life that is used in GPS, see below. no see below. [snip a long story that leads to a simple to debunk result] So Ballistic theory predicts the same result using a velocity triangle as SR predicts as being due to 'time dilation'. Wrong, see below. right - see below Note again that there is no identifiable physical mechanism which causes time dilation it is simply assumed to take place as it is necessary to get the right answer - i.e. the answer given by the credible physical explanation of ballistic theory. Wrong again - and this time I find it hard to believe that you don't know that the physical mechanisms are as clearly identifiable as for example those that are involved in engines for keeping the laws of thermodynamics. SR is a mathematical model which does not attempt to answer physical questions. If you are a believer in Lorentz's aether you maybe have a point. ---------------------------------------------------------------------- GPS "Time Dilation" As seen above the frequency measured when orthogonal to the source is predictably the same for both theories. The centre of the earth is always orthogonal to the motion of a GPS satellite (assuming a circular orbit) therefore the frequency will always be Fo x Sqr(1 - v^2/c^2) whichever theory is used. The ballistic theory explains it without exotic time dilation. It is simply the result of a velocity triangle. A velocity triangle can only affect the signal readout The frequency measured. - it cannot cause an accumulation of time retardation as is the case with GPS. Rubbish. The tick of a clock is simply a frequency divided by some number n. If the frequency on board the satellite is Fo and that frequency is transmitted then you will only measure it as Fo if it reaches you travelling at c. According to ballistic theory it doesn't reach you travelling at c. Because of the velocity triangle the frequency measured orthogonal to the source is the same for both theories if you divide it to get a clock the ticks will be the same for both theories thus both theories need to adjust the oscillator on the satellite so as to keep the ticks the same. Clock resonators are adjusted for speed and height in orbit by misadjusting them on the ground. Thus ballistic theory fails here! Harald -- John Kennaugh |
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John Kennaugh wrote:
Again my personal view is that light cannot be both waves and particles and that the most promising approach is to accept that light is made up of photons and try and come up with a model of a photon which would explain the very convincing wavelike behaviour of light. That has already been done! It is known as quantum electrodynamics, and is the most accurately tested theory known (something like 12 significant digits). In QED, photons are quantum excitations of a field, and their probability density is what gives them wavelike behavior in some regimes, and the fact that they are discrete excitations gives them particle-like behavior in other regimes. I agree that the wave theory is very convincing up to a point but having reached that point I feel one has to accept that light IS made up of particles although it BEHAVES like a system of waves. Yes. This is all explained in a non-mathematical way in: Feynman, _QED_. What causes an electron to always have the same mass. Something fundamental to nature. A modern answer does not include "cause", but observes that this property of electrons is a direct consequence of their all being quantum excitations of the same field. Tom Roberts |
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On Apr 25, 9:52 am, John Kennaugh
wrote: Authors trying to sell Relativity to a student have a problem. They cannot go through a logical sequence of historical events - the history of relativity is quite frankly embarrassing. Neither can they appeal to common sense, relativity is of course counter intuitive. Right or wrong, the basis of SR is not counter intuitive to me, and I'm sure to many other people. I guess it's a question of attitude. If you tried very hard one of these days to view elctromagnetism as preeminent over dynamics and mechanics you might start to feel it right. However, the equations and conclusions that emanate from that basis are indeed counter-intuitive, although they do follow mathematically. Some text books use semantic trickery. The most honest I have seen is an on-line Harvard university text book where the author says in effect "it may seem daft but it works". I would point out however that the same could be said of the geocentric theory of the solar system. A dominant belief that the earth was at the centre forced the maths to be transformed in such a way that they gave the right answer. "If the Lord Almighty had consulted me before embarking on creation I should have recommended something simpler." Alfonso 'the wise' of Castile (1221-1284) having studied the Ptolemaic system. As I will explain later I see parallels in the history of relativity where I will show that a dominant belief played a part in distorting our way of viewing things. If you are a follower of Occam then the MMX shows that the speed of light is not constant w.r.t the aether as had been supposed and so must therefore be constant w.r.t the source - there being no plausible causality by which 'where it ended up' could be responsible for the speed at which it travelled to get there. Ritz's emission theory of light published in 1908 and Waldron's Ballistic theory of light published in 1977 are both based on the assumption that the speed of light is source dependent. Both theories were suppressed, not by any act of censorship but by totally ignoring them - which is much more effective. I don't dispute (nor agree with) the overall validity of your view, but some would argue that you are not pushing Occam's razor far enough. They would say that MMX makes the ether irrelevant. Hence your "so must therefore" reasoning becomes invalid. |
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This message is brought to you by Androcles
http://www.androcles01.pwp.blueyonder.co.uk/ wrote in message ... | On Apr 25, 9:52 am, John Kennaugh | wrote: | Authors trying to sell Relativity to a student have a problem. They | cannot go through a logical sequence of historical events - the history | of relativity is quite frankly embarrassing. Neither can they appeal to | common sense, relativity is of course counter intuitive. | | Right or wrong, the basis of SR is not counter intuitive to me, and | I'm sure to many other people. Why did Einstein say the speed of light from A to B is c-v, the speed of light from B to A is c+v, the "time" each way is the same? | I guess it's a question of attitude. Ah, so you guess. How very scientific. I calculate you are an idiot. *plonk* |
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On May 5, 1:02 am, "Androcles" wrote:
This message is brought to you by Androcles http://www.androcles01.pwp.blueyonder.co.uk/ wrote in message ... | On Apr 25, 9:52 am, John Kennaugh| wrote: | Authors trying to sell Relativity to a student have a problem. They | cannot go through a logical sequence of historical events - the history | of relativity is quite frankly embarrassing. Neither can they appeal to | common sense, relativity is of course counter intuitive. | | Right or wrong, the basis of SR is not counter intuitive to me, and | I'm sure to many other people. Why did Einstein say the speed of light from A to B is c-v, the speed of light from B to A is c+v, the "time" each way is the same? Ok, I don't have his paper in front of me. Give me the whole citation (with context) and I'll explain it to you. | I guess it's a question of attitude. Ah, so you guess. How very scientific. I calculate you are an idiot. *plonk* Nah nah. You don't understand gentlemanliness. John is a gentleman as far as I can see. I wasn't talking about science but about psychanalysis. In order to be understood by you, here's how I would have phrased it: "I guess the reason you can't get this into your two- cell reptilian brain is that you ****in' don't have the right attitude." I suggest that you be appointed as Her Majesty's full-time jester. That would put your ineptia into use. |
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wrote:
On Apr 25, 9:52 am, John Kennaugh wrote: Authors trying to sell Relativity to a student have a problem. They cannot go through a logical sequence of historical events - the history of relativity is quite frankly embarrassing. Neither can they appeal to common sense, relativity is of course counter intuitive. Right or wrong, the basis of SR is not counter intuitive to me, and I'm sure to many other people. The first postulate is not counter intuitive but is also consistent with Ballistic theory. SR therefore depends upon the second postulate which in effect says that the speed of light is constant w.r.t the observer observing it. This is counter intuitive in that it implies that what controls the transfer of energy is the observer. I guess it's a question of attitude. If you tried very hard one of these days to view elctromagnetism as preeminent over dynamics and mechanics you might start to feel it right. Why should electromagnetism be right and mechanics wrong? Why not the other way about? Maxwell's electromagnetism was disproved firstly by the MMX and then by the ultraviolet catastrophe, by Planck's quantization and finally by Einstein's explanation of the photoelectric effect. While SR is an explanation for the MMX it simply ignores the rest of the experimental evidence which challenges it. If you assume electromagnetism is right despite the above you have to distort time, space and mass in order to get the maths work - ditching 3 apparently sensible and long accepted axioms of physics. The opposite view is that mechanics is pre-eminent over electromagnetism and that light is also mechanical consisting of particles. The speed at which particles are ejected from the source is a function of the physical processes ejecting the - i.e. source dependent. The only change needed to electrical theory is that Coulombs law only holds for static charges and needs modifying when the charge is in motion. Photon particles have mass, increase their energy falling under gravity, lose energy climbing out of the effects of gravity and are deflected by gravity. If you transform reality it works mathematically up to a point. In the limit it goes wrong. In the limit - something travelling at c - mass becomes infinite. Photons travel at c and appear to have mass according to all previous definitions of mass. Physicists cannot accept that they can possibly have made a mistake so despite the evidence photons must be massless and mass has to be redefined. However, the equations and conclusions that emanate from that basis are indeed counter-intuitive, although they do follow mathematically. Some text books use semantic trickery. The most honest I have seen is an on-line Harvard university text book where the author says in effect "it may seem daft but it works". I would point out however that the same could be said of the geocentric theory of the solar system. A dominant belief that the earth was at the centre forced the maths to be transformed in such a way that they gave the right answer. "If the Lord Almighty had consulted me before embarking on creation I should have recommended something simpler." Alfonso 'the wise' of Castile (1221-1284) having studied the Ptolemaic system. As I will explain later I see parallels in the history of relativity where I will show that a dominant belief played a part in distorting our way of viewing things. If you are a follower of Occam then the MMX shows that the speed of light is not constant w.r.t the aether as had been supposed and so must therefore be constant w.r.t the source - there being no plausible causality by which 'where it ended up' could be responsible for the speed at which it travelled to get there. Ritz's emission theory of light published in 1908 and Waldron's Ballistic theory of light published in 1977 are both based on the assumption that the speed of light is source dependent. Both theories were suppressed, not by any act of censorship but by totally ignoring them - which is much more effective. I don't dispute (nor agree with) the overall validity of your view, but some would argue that you are not pushing Occam's razor far enough. They would say that MMX makes the ether irrelevant. In what sense? Maxwell's theory makes two testable predictions re the aether. One is that the measured speed of light will vary with the speed of an observer relative to the aether - tested in the MMX and found to be false. The other that because the speed of light is controlled by the aether light speed is independent of the source. Either the MMX showed: 1/ that there is no aether in which case one should assume the second prediction to be false like the first as there is no other physical process other than that taking place in the source which can rob the source of having an effect. or 2/ there is an aether and it is necessary to find an explanation as to why it appears that there is no observable relative motion between the aether and an observer. First Lorentz and then Einstein tried to explain why an observer always appears stationary w.r.t the aether. Lorentz assumed motion relative to the aether affected measurement in such a way as to produce an illusion that an observer is stationary w.r.t the aether. You can look upon Einstein either as assuming that nature provided a suitable aether which every observer would naturally find himself stationary w.r.t (His aether without the immobility of Lorentz's -1920 lecture) or as an empirical acceptance that for whatever reason observationally an observer is apparently stationary w.r.t the aether. Either way the second postulate describes exactly what an observer stationary w.r.t the aether would experience. Basically the historical route to modern SR is - Interpret the MMX assuming the existence of the aether. Work out the maths and accept their conclusions - then disown the aether and decide that physics does not need physical interpretation. If you start with assuming that the MMX means there is no aether there is no route to SR. Hence your "so must therefore" reasoning becomes invalid. -- John Kennaugh |
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#19
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On May 5, 2:27*pm, John Kennaugh
idiocies snipped Old fart, don't you understand that BaTh has ALREADY been falsified by several experiments? Why do you keep blathering? |
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