﻿ Einstein's Relativity as Ideology
Discussion:
Einstein's Relativity as Ideology
(trop ancien pour répondre)
Pentcho Valev
2017-11-20 17:56:41 UTC
Raw Message
Imagine a student who wants to understand the "enough strangeness" taught by David Morin:

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." http://www.people.fas.harvard.edu/~djmorin/chap11.pdf

The student does some search and finds that the "enough strangeness" is actually a homogeneous gravitational field introduced by Einstein in 1918. This field, generated during the turning-around acceleration of the traveling twin, somehow reaches the distant stationary twin and converts him into an old man:

Albert Einstein 1918: "A homogeneous gravitational field appears, that is directed towards the positive x-axis. Clock U1 is accelerated in the direction of the positive x-axis until it has reached the velocity v, then the gravitational field disappears again. An external force, acting upon U2 in the negative direction of the x-axis prevents U2 from being set in motion by the gravitational field. [...] According to the general theory of relativity, a clock will go faster the higher the gravitational potential of the location where it is located, and during partial process 3 U2 happens to be located at a higher gravitational potential than U1. The calculation shows that this speeding ahead constitutes exactly twice as much as the lagging behind during the partial processes 2 and 4." http://sciliterature.50webs.com/Dialog.htm

"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

The student is in a difficult situation, isn't he/she?

Pentcho Valev
Pentcho Valev
2017-11-20 22:31:44 UTC
Raw Message
Einstein's spacetime is not just the false alternative to Newton's absolute time. It is a paralyzing idiocy incapable of any prediction about clocks. Popular "predictions" - "Moving clocks run slow", "Traveling twin returns younger" - are actually non sequitur. This was clear to Einstein from the very beginning:

Albert Einstein, On the Electrodynamics of Moving Bodies, 1905: "From this there ensues the following peculiar consequence. If at the points A and B of K there are stationary clocks which, viewed in the stationary system, are synchronous; and if the clock at A is moved with the velocity v along the line AB to B, then on its arrival at B the two clocks no longer synchronize, but the clock moved from A to B lags behind the other which has remained at B by tv^2/2c^2 (up to magnitudes of fourth and higher order), t being the time occupied in the journey from A to B." http://www.fourmilab.ch/etexts/einstein/specrel/www/

The conclusion

"the clock moved from A to B lags behind the other which has remained at B"

does not follow from Einstein's 1905 postulates - the argument is INVALID. This means that the conclusion is unacceptable no matter whether the postulates (the principle of relativity and the constancy of the speed of light) are true or false. The wisdom "Moving clocks run slow" is just a generalized formulation of Einstein's 1905 non sequitur.

The following two conclusions, in contrast, VALIDLY follow from the postulates (they will be true if the postulates are true):

Conclusion 1: The clock moved from A to B lags behind the other which has remained at B, as judged from the stationary system.

Conclusion 2: The clock which has remained at B lags behind the clock moved from A to B, as judged from the moving system.

Conclusions 1 and 2 (symmetrical time dilation) in their combination give no prediction for the readings of the two clocks as they meet at B. This impotence remains the central feature of Einstein's spacetime - without recourse to invalid arguments, it is unable to predict anything about clocks.

Unlike conclusions 1 and 2, the INVALIDLY deduced conclusion does provide a prediction - the moving clock is SLOW, the stationary one is FAST (asymmetrical time dilation). The famous but idiotic "travel into the future" is a direct implication of the INVALIDLY deduced conclusion - the slowness of the moving clock means that its (moving) owner can remain virtually unchanged while sixty million years are passing for the stationary system:

Thibault Damour: "The paradigm of the special relativistic upheaval of the usual concept of time is the twin paradox. Let us emphasize that this striking example of time dilation proves that time travel (towards the future) is possible. As a gedanken experiment (if we neglect practicalities such as the technology needed for reaching velocities comparable to the velocity of light, the cost of the fuel and the capacity of the traveller to sustain high accelerations), it shows that a sentient being can jump, "within a minute" (of his experienced time) arbitrarily far in the future, say sixty million years ahead, and see, and be part of, what (will) happen then on Earth. This is a clear way of realizing that the future "already exists" (as we can experience it "in a minute")." http://www.bourbaphy.fr/damourtemps.pdf

Pentcho Valev
Pentcho Valev
2017-11-21 13:27:00 UTC
Raw Message
Einstein's 1905 lie - the moving clock runs slower - is taught nowadays either unchanged or formulated as "Time SLOWS DOWN for the moving observer":

Brian Cox (2:25): "Moving clocks run slowly"

John Gribbin: "Einstein's special theory of relativity tells us how the Universe looks to an observer moving at a steady speed. Because the speed of light is the same for all such observers, moving clocks run slow..." http://www.newscientist.com/article/mg13117878.000-a-special-theory-of-relativity.html

Neil deGrasse Tyson: "We have ways of moving into the future. That is to have time tick more slowly for you than others, who you return to later on. We've known that since 1905, Einstein's special theory of relativity, which gives the precise prescription for how time would slow down for you if you are set into motion." http://abcnews.go.com/Entertainment/back-future-30th-anniversary-neil-degrasse-tyson-talks/story?id=32191481

Jim Al-Khalili: "And, the faster you move and the longer you move at that speed, the slower your clock ticks, including your own internal biological clock, and so the slower you age - by tiny, tiny fractions of a second of course." http://www.jimal-khalili.com/blogs/2017/7/20/gravity-and-me-my-bbc4-doc-and-the-problem-with-the-app

Brian Greene: "If you're moving relative to somebody else, time for you slows down."

Although rarely, some Einsteinians implicitly repudiate Einstein's 1905 lie. According to special relativity, time SPEEDS UP for the moving observer:

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://www.people.fas.harvard.edu/~djmorin/chap11.pdf

"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." http://topquark.hubpages.com/hub/Twin-Paradox

Pentcho Valev
Pentcho Valev
2017-11-23 17:38:22 UTC
Raw Message
Joe Wolfe: "At this stage, many of my students say things like "The invariance of the speed of light among observers is impossible" or "I can't understand it". Well, it's not impossible. It's even more than possible, it is true. This is something that has been extensively measured, and many refinements to the Michelson and Morley experiment, and complementary experiments have confirmed this invariance to very great precision. As to understanding it, there isn't really much to understand. However surprising and weird it may be, it is the case. It's the law in our universe. The fact of the invariance of c doesn't take much understanding." https://newt.phys.unsw.edu.au/einsteinlight/jw/module3_weird_logic.htm

Why do students say "The invariance of the speed of light among observers is impossible"? Initially they are still sane and imagine simple scenarios, like those in the videos below. It is obvious to them that the speed of the light relative to the moving observer is different from the speed relative to the stationary one:

"Doppler effect - when an observer moves towards a stationary source. ...the velocity of the wave relative to the observer is faster than that when it is still."

"Doppler effect - when an observer moves away from a stationary source. ...the velocity of the wave relative to the observer is slower than that when it is still."

However Joe Wolfe will continue to teach nonsense, loudly and repeatedly - in the end students will become indistinguishable from Bingo the Clowno and will get the name "Bingo the Einsteiniano":

Bingo the Clowno

Pentcho Valev