A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Astronomy and Astrophysics » Astronomy Misc
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

WHY EINSTEIN POSTULATED CONSTANT SPEED OF LIGHT



 
 
Thread Tools Display Modes
  #1  
Old November 7th 15, 12:06 PM posted to sci.astro
Pentcho Valev
external usenet poster
 
Posts: 8,078
Default WHY EINSTEIN POSTULATED CONSTANT SPEED OF LIGHT

Einstein explained the nonsense (the speed of light relative to the observer is independent of the speed of the observer) in terms of more nonsense (time and space are relative):

http://negrjp.fotoblog.uol.com.br/im...0819051851.jpg

http://www.aip.org/history/exhibits/...relativity.htm
John Stachel: "But here he ran into the most blatant-seeming contradiction, which I mentioned earlier when first discussing the two principles. As noted then, the Maxwell-Lorentz equations imply that there exists (at least) one inertial frame in which the speed of light is a constant regardless of the motion of the light source. Einstein's version of the relativity principle (minus the ether) requires that, if this is true for one inertial frame, it must be true for all inertial frames. But this seems to be nonsense. How can it happen that the speed of light relative to an observer cannot be increased or decreased if that observer moves towards or away from a light beam? Einstein states that he wrestled with this problem over a lengthy period of time, to the point of despair."

https://www.aip.org/history/exhibits...teins-time.htm
Peter Galison: "First, he stipulated that all the laws of physics - including electricity and magnetism - were the same in any constantly moving frame of reference. Then he added a seemingly simple (and modest) second assumption: Light travels at the same speed no matter how fast its source is moving. To anyone thinking of ether this was not so strange: Move your hands at any reasonable speed through a room of still air; once you clap your hands the sound waves propagate through the room at the same speed - independent of the original motion of your hands. Maybe light was like that: a lamp moving in the ether simply excited light waves that radiated out at a single speed independent of the motion of the lamp. Yet these two reasonable starting assumptions appeared to contradict one another. Suppose lamps were flying this way and that at various speeds, but that in some frame the light beams from those lamps were all traveling at 186,000 miles per second, just the speed predicted by the equations of electrodynamics. Wouldn't those same beams of light appear to be traveling at different speeds when seen from a different, moving frame of reference? If that was so, then the equations of electrodynamics would only be valid in one frame of reference, violating Einstein's first principle. It was to resolve this apparent contradiction that Einstein made his single most dramatic move: he criticized the very idea of time as it was usually understood. In particular, he relentlessly pursued the meaning of "simultaneity." Only by criticizing the foundational notions of time and space could one bring the pieces of the theory - that the laws of physics were the same in all constantly moving frames; that light traveled at the same speed regardless of its source - into harmony."

By disfiguring space and time Einstein actually killed rationality in science but failed to completely camouflage the idiotic conclusion that the speed of light (relative to the observer) is independent of the speed of the observer. Any reasonable interpretation of the Doppler effect (moving observer) shows that the speed of light is different for differently moving observers, which means that Einstein's 1905 second (constant-speed-of-light) postulate is false:

http://physics.bu.edu/~redner/211-sp...9_doppler.html
Professor Sidney Redner: "The Doppler effect is the shift in frequency of a wave that occurs when the wave source, or the detector of the wave, is moving. Applications of the Doppler effect range from medical tests using ultrasound to radar detectors and astronomy (with electromagnetic waves). (...) We will focus on sound waves in describing the Doppler effect, but it works for other waves too. (...) Let's say you, the observer, now move toward the source with velocity vO. You encounter more waves per unit time than you did before. Relative to you, the waves travel at a higher speed: v'=v+vO. The frequency of the waves you detect is higher, and is given by: f'=v'/λ=(v+vO)/λ."

"Relative to you, the waves travel at a higher speed" = Goodbye Einstein!

http://www.hep.man.ac.uk/u/roger/PHY.../lecture18.pdf
Professor Roger Barlow: "The Doppler effect - changes in frequencies when sources or observers are in motion - is familiar to anyone who has stood at the roadside and watched (and listened) to the cars go by. It applies to all types of wave, not just sound. (...) Moving Observer. Now suppose the source is fixed but the observer is moving towards the source, with speed v. In time t, ct/λ waves pass a fixed point. A moving point adds another vt/λ. So f'=(c+v)/λ."

That is, for all types of wave, the speed of the waves relative to the fixed point (observer) is

(ct/λ)(λ/t) = c

The speed of the waves relative to the moving point (observer) is

(ct/λ + vt/λ)(λ/t) = c + v,

in violation of Einstein's relativity.

http://www.einstein-online.info/spotlights/doppler
Albert Einstein Institute: "The frequency of a wave-like signal - such as sound or light - depends on the movement of the sender and of the receiver. This is known as the Doppler effect. (...) Here is an animation of the receiver moving towards the source:

http://www.einstein-online.info/imag...ler_static.gif (stationary receiver)

http://www.einstein-online.info/imag...ector_blue.gif (moving receiver)

By observing the two indicator lights, you can see for yourself that, once more, there is a blue-shift - the pulse frequency measured at the receiver is somewhat higher than the frequency with which the pulses are sent out. This time, the distances between subsequent pulses are not affected, but still there is a frequency shift: As the receiver moves towards each pulse, the time until pulse and receiver meet up is shortened. In this particular animation, which has the receiver moving towards the source at one third the speed of the pulses themselves, four pulses are received in the time it takes the source to emit three pulses."

If the distance between subsequent pulses is d and "the time it takes the source to emit three pulses" is t, then the speed of the pulses relative to the source is

3d/t = c,

and relative to the moving receiver is

4d/t = (4/3)c,

in violation of Einstein's relativity.

Pentcho Valev
  #2  
Old November 9th 15, 09:00 AM posted to sci.astro
Pentcho Valev
external usenet poster
 
Posts: 8,078
Default WHY EINSTEIN POSTULATED CONSTANT SPEED OF LIGHT

https://www.youtube.com/watch?v=jNt7EtjzVDY
0:29 : "Before Einstein was even born, physicists showed that the speed of light was one of those absolute things which can't be changed by a switcheroo. So any switcheroo we do has to keep light moving at the same speed..."

No physicist showed, both before and after Einstein was born, that the speed of light was constant - in Maxwell's 19th century electromagnetic theory, for instance, the speed of light varied with the speed of the observer. Yet, thanks to a century-long brainwashing, nowadays everybody believes that Einstein's 1905 constant-speed-of-light postulate was fully justified. And if the speed of light is constant, time should be relative in the following idiotic way:

http://www.bourbaphy.fr/damourtemps.pdf
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")."

Pentcho Valev
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
THE SPEED OF LIGHT IS NOT CONSTANT Pentcho Valev Astronomy Misc 3 August 11th 15 06:41 PM
UNPERSONS CHALLENGING EINSTEIN'S CONSTANT SPEED OF LIGHT Pentcho Valev Astronomy Misc 3 July 9th 15 07:16 AM
EINSTEIN AND THE CONSTANT SPEED OF LIGHT Pentcho Valev Astronomy Misc 1 January 22nd 15 09:39 PM
WHY EINSTEIN RETAINED THE CONSTANT SPEED OF LIGHT Pentcho Valev Astronomy Misc 3 August 30th 14 07:18 PM
EINSTEIN'S 1905 FALSE CONSTANT-SPEED-OF-LIGHT POSTULATE Pentcho Valev Astronomy Misc 7 February 27th 11 08:24 AM


All times are GMT +1. The time now is 06:18 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.