Mikes10 Â Â 10 #1909 Posted January 3, 2019 (edited) Â Here is an interesting video: "The School Boys Who Cracked the Soviet Secret" Of course the 'Spherically Challenged' amongst us will say it is all a hoax dreamed up by the Russians, Europeans and Americans. Â https://www.youtube.com/watch?v=HQFmF9Gnp0A Â Â Â Â Â Â Edited January 3, 2019 by Mikes10 Share this post Link to post Share on other sites Share this content via...
Obelix   11 #1910 Posted January 3, 2019 3 hours ago, petemcewan said:   Physics- again:   http://async.org.uk/IvorCatt+DavidWalton.html Its not physics. It's Catts**t. Have you actually read the crap he puts out? Share this post Link to post Share on other sites Share this content via...
petemcewan   27 #1911 Posted January 3, 2019 (edited) Obelix,  It's not universally held that I Catt wrote crap. I have in front of me. Digital Electronic Design. VOl 1. Catt, Walton and Davidson. I've read it from cover to cover several times. His lecturers speak for themselves. I prefer this discussion than the ramblings of FE's.  You never know,what goes between you and I may induce others to delve into the science of electronics, communications and electromagnetic theory and principles.             Edited January 3, 2019 by petemcewan Share this post Link to post Share on other sites Share this content via...
petemcewan   27 #1912 Posted January 3, 2019 (edited) The Chinese have landed a probe on the dark side of the moon.  Maybe they can find the remains of " Ivor The Moon".   Edited January 3, 2019 by petemcewan Share this post Link to post Share on other sites Share this content via...
apelike   10 #1913 Posted January 3, 2019 1 hour ago, petemcewan said: The Chinese have landed a probe on the dark side of the moon. Just to be pedantic.. There is no "Dark Side" only a Far Side, unless you are a Pink Floyd fan that is..  but I do notice it its not flat. Share this post Link to post Share on other sites Share this content via...
Obelix   11 #1914 Posted January 3, 2019 Catt's ramblings about his transmission line theory and alternative electromagnetism are in fact s**t. They have no basis in fact, he cannot adequatley explain them, he cannot explain away existing theories that invalidate his theories and thats been the case since the late 1970's.  He might be an adequate designer, but that doesnt mean that he's an authority on the physics just because he can stick some components together. It's the same as car mechanic building an engine up from various parts - might be a very good mechanic but it doesnt mean they know diddly squat about heat engines and the Carnot cycle. Share this post Link to post Share on other sites Share this content via...
petemcewan   27 #1915 Posted January 4, 2019 (edited) The Chinese have landed a probe on the dark side of the moon.  Maybe they can find the remains of " Ivor The Moon".  Obelix, From Catt's book on Electromagnetism. It looks -to me- to be a pretty good description of a travelling wave . He says , his theories are proven experimentally. Interacting TEM waves. Generally, the interaction of two TEM waves is thought to be covered by Maxwell's Equations. However, I have shown (Ref.9) that this is not so. Maxwell's Equations contain only; (1)   the velocity of propagation of the TEM wave   and (2)   the impedance of the medium   . They contain no additional information about electromagnetism in general, let alone information on the way two colliding TEM waves interact. Even more curiously, the empirical laws governing reflection at a resistively terminated transmission line seem to be a body of knowledge divorced from Maxwell's Equations. Partial reflection in a transmission line. It is found experimentally that if a TEM wave travels down a uniform transmission line   (Fig.11) joined to a different transmission line   , some of the energy current reflects at the discontinuity and some continues (Ref.10). The voltage reflection coefficient is found to be  . In particular, if a pulse V travelling down a   transmission line at the speed of light collides into a   termination made up of three   resistors in series, then a   pulse reflects and   dissipates across the termination; (   in each   resistor). The front end of a long   transmission line looks exactly like a   resistor. The situation remains the same in Figure 12; three downstream coaxial cables connected in series, mimicking the three   resistors, and also (Fig.13) a parallel plate transmission line delivering the pulse into three such lines in series. Our next step is to widen the parallel plates to infinity, and this gives us our simplest situation for analysis (Fig.14). Having reached this stage, we can set out to gain the broader insights which our experimental knowledge of reflection in transmission lines gives us. (Consideration of conservation of energy and also that the voltage across the discontinuity must be continuous lead us to the same formula for the reflection coefficient.) Source:  http://www.ivorcatt.com/em.htm Edited January 4, 2019 by petemcewan Share this post Link to post Share on other sites Share this content via...
Obelix   11 #1916 Posted January 4, 2019 Yes.  Umm, so?  Despite his protestations over the last thirty or forty years this is not new stuff and is adequately explained. If he is still confused about reflections I think he needs to look at Kirchoff again. Share this post Link to post Share on other sites Share this content via...
petemcewan   27 #1917 Posted January 5, 2019 Obelix,  I'll go and delve into Kirchoff. Just a point I think you will appreciate. One of the hallmarks of good science is that the results of experiments are repeatable by other scientists. I presume that Catt's critics have found that the results of his experiments cannot be duplicated.  Share this post Link to post Share on other sites Share this content via...
Obelix   11 #1918 Posted January 5, 2019 I think it's more that they dont actually understand what hes rambling on about half the time so cant even begin to start figuring it out. Share this post Link to post Share on other sites Share this content via...
melthebell   862 #1919 Posted January 5, 2019 A supermassive blackhole is heading our way, but dont worry we've got plenty of time to panic https://kichushomoy.com/2019/01/04/a-supermassive-black-hole-is-heading-earths-way-at-110-km-per-second/?fbclid=IwAR01dhIwE1F3HsQuf6ijQ6AXG12YCoqfAyOe_LcI2ilWCxMvvsk_LHCEAuo Share this post Link to post Share on other sites Share this content via...
Mikes10   10 #1920 Posted January 10, 2019 (edited) Electromagnetic Waves demonstration by Sir Lawrence Bragg  For anyone interested in EM waves this video is well worth viewing. Around 9 minutes into the presentation, demo of microwaves focused using an optical lens.            Edited January 10, 2019 by Mikes10 Share this post Link to post Share on other sites Share this content via...