<< Previous Topic | Next Topic >> Return to Forum

# Einstein's Relativity: the Madness of the Civilization

September 8 2017 at 8:17 AM
Pentcho Valev

David Morin, Introduction to Classical Mechanics With Problems and Solutions, Chapter 11, p. 14: "Twin A stays on the earth, while twin B flies quickly to a distant star and back. [...] For the entire outward and return parts of the trip, B does observe A's clock running slow, but enough strangeness occurs during the turning-around period to make A end up older. Note, however, that a discussion of acceleration is not required to quantitatively understand the paradox..." http://www.people.fas.harvard.edu/~djmorin/chap11.pdf

Physics Girl (4:30): "One last question. What's happening to the clocks during the period of acceleration? We still get time dilation, but we have to use a different set of rules from the general relativity. General relativity states that clocks runs slower in accelerated reference frames. So while your twin is turning around, her clock runs slower, and she sees the same thing. She sees your clock running faster than hers, so you're aging quicker. It's during this period of acceleration that you become the older twin."

"At the same time, the twin in the spaceship considers himself to be the stationary twin, and therefore as he looks back towards Earth he sees his brother ageing more slowly than himself. [...] When the twin in the spaceship turns around to make his journey home, the shift in his frame of reference causes his perception of his brother's age to change rapidly: he sees his brother getting suddenly older. This means that when the twins are finally reunited, the stay-at-home twin is the older of the two." https://hubpages.com/education/Twin-Paradox

John Norton: "Moments after the turn-around, when the travelers clock reads just after 2 days, the traveler will judge the stay-at-home twin's clock to read just after 7 days. That is, the traveler will judge the stay-at-home twin's clock to have jumped suddenly from reading 1 day to reading 7 days. This huge jump puts the stay-at-home twin's clock so far ahead of the traveler's that it is now possible for the stay-at-home twin's clock to be ahead of the travelers when they reunite." http://www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/spacetime_tachyon/index.html

Pentcho Valev

 Respond to this message
Pentcho Valev

# Re: Einstein's Relativity: the Madness of the Civilization

September 8 2017, 11:48 AM
Pentcho Valev

# Re: Einstein's Relativity: the Madness of the Civilization

September 9 2017, 3:21 AM
 Brian Cox teaches idiotic non sequitur: https://www.youtube.com/watch?v=-O8lBIcHre0 Brian Cox: 2:25 "Moving clocks run slowly"; 3:56 "Time travel into the future is possible" According to special relativity, moving clocks run slowly as judged from the stationary system, but they run FAST as judged from the moving system: http://www.people.fas.harvard.edu/~djmorin/chap11.pdf David Morin, Introduction to Classical Mechanics With Problems and Solutions, Chapter 11, p. 14: "Twin A stays on the earth, while twin B flies quickly to a distant star and back. [...] For the entire outward and return parts of the trip, B does observe A's clock running slow..." http://topquark.hubpages.com/hub/Twin-Paradox "The situation is that a man sets off in a rocket travelling at high speed away from Earth, whilst his twin brother stays on Earth. [...] ...the twin in the spaceship considers himself to be the stationary twin, and therefore as he looks back towards Earth he sees his brother ageing more slowly than himself." That is, "Moving clocks run slowly as judged from the stationary system" is a validly deduced prediction of special relativity (does follow from Einstein's 1905 postulates) whereas "Moving clocks run slowly" is non sequitur (does NOT follow from Einstein's 1905 postulates). Accordingly, "Time travel into the future is possible" is also non sequitur (does NOT follow from Einstein's 1905 postulates). Pentcho Valev
Pentcho Valev

# Re: Einstein's Relativity: the Madness of the Civilization

September 9 2017, 11:36 AM
 In Einstein's schizophrenic world, in order to save Divine Albert's Divine Theory, objects get longer than themselves. Consider the famous bug-rivet paradox: http://hyperphysics.phy-astr.gsu.edu/hbase/Relativ/bugrivet.html The Bug-Rivet Paradox The bug is squashed in the rivet's frame and alive in the bug's frame. This is reductio ad absurdum. Conclusion: The underlying premise, Einstein's 1905 constant-speed-of-light postulate, is false. Einsteinians resolve the absurdity by superimposing an idiocy - the rivet gets longer than itself: http://math.ucr.edu/~jdp/Relativity/Bug_Rivet.html Professor John de Pillis, University of California Riverside: "In fact, special relativity requires that after collision, the rivet shank length increases beyond its at-rest length d." http://brianclegg.blogspot.bg/2011/11/relativity-can-be-riveting.html Brian Clegg: "Unfortunately, though, the rivet is fired towards the table at a fair percentage of the speed of light. It's somewhat typical of this book that all it tells us about the speed is that γ is 2, which doesn't really give you an idea of how fast the rivet is going, but if my back of an envelope calculations are right, this is around 0.87 times the speed of light. Quite a fast rivet, then. [...] But here's the thing. Just because the head of the rivet has come to a sudden stop doesn't mean the whole rivet does. A wave has to pass along the rivet to its end saying 'Stop!' The end of the rivet will just keep on going until this wave, typically travelling at the speed of sound, reaches it. That fast-moving end will crash into the beetle long before the wave arrives. [...] Isn't physics great?" Note that, according to Brian Clegg, the end of the rivet keeps on going at 87% the speed of light and a wave traveling at the speed of sound is chasing it in order to stop it! We all live in Einstein's schizophrenic world, don't we? "Einstein's oligophrenic world" sounds much better. Pentcho Valev

 Respond to this message
 << Previous Topic | Next Topic >> Return to Forum