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THE WAVELENGTH FRAUD IN EINSTEIN'S RELATIVITY



 
 
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  #1  
Old October 19th 14, 09:46 AM posted to sci.astro
Pentcho Valev
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Posts: 8,078
Default THE WAVELENGTH FRAUD IN EINSTEIN'S RELATIVITY

A stationary source emits light waves towards a stationary observer. In the system of the source, the frequency is f, the speed of the waves is c and the wavelength is λ=c/f.

The source starts moving with (small) speed v towards the observer. How do the frequency, the speed of the light waves and the wavelength change in the system of the source?

Einstein's relativity correctly predicts that the frequency and the speed of the light waves remain unchanged:

f' = f ; c' = c

This implies that the moving source emits UNCHANGED wavelength:

λ' = c'/f' = λ

On the other hand, UNCHANGED wavelength is fatal for Einstein's relativity, in view of what will happen later when the light eventually reaches the observer. So Einsteinians fiercely teach that the moving light source, just like a moving sound source, emits CHANGED wavelength:

https://www.youtube.com/watch?v=vDvIhiCnatE
"Doppler Effect In Light Waves"

https://www.youtube.com/watch?v=h4OnBYrbCjY
"The Doppler Effect: what does motion do to waves?"

http://www.target.com/p/a-brief-hist...k/-/A-11823016
Stephen Hawking, "A Brief History of Time", Chapter 3: "Now imagine a source of light at a constant distance from us, such as a star, emitting waves of light at a constant wavelength. Obviously the wavelength of the waves we receive will be the same as the wavelength at which they are emitted (the gravitational field of the galaxy will not be large enough to have a significant effect). Suppose now that the source starts moving toward us. When the source emits the next wave crest it will be nearer to us, so the distance between wave crests will be smaller than when the star was stationary."

http://www.einstein-online.info/spotlights/doppler
Albert Einstein Institute: "Next, let us look at a slightly different situation, where the source is moving towards the detector:

Stationary source: http://www.einstein-online.info/imag...ler_static.gif

Moving source: http://www.einstein-online.info/imag...ource_blue.gif

We assume that the motion of the sender does not influence the speed at which the pulses travel, and that the pulses are sent with the same frequency as before. Still, as we can see in the following animation, the motion influences the pulse pattern: The distance between successive pulses is now smaller than when both sender and receiver were at rest. Consequently, the pulses arrive at the receiver in quicker succession."

Pentcho Valev
  #2  
Old October 20th 14, 10:13 AM posted to sci.astro
Pentcho Valev
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Posts: 8,078
Default THE WAVELENGTH FRAUD IN EINSTEIN'S RELATIVITY

A light source emits a series of short pulses the distance between which is d (e.g. d = 300000 km). A stationary observer/receiver measures the frequency of the pulses to be f=c/d:

http://www.einstein-online.info/imag...ler_static.gif

The observer starts moving with (small) speed v towards the source - the measured frequency shifts from f=c/d to f'=(c+v)/d:

http://www.einstein-online.info/imag...ector_blue.gif

Why does the frequency shift from f=c/d to f'=(c+v)/d ?

Answer 1 (fatal for Einstein's relativity): Because the speed of the pulses relative to the observer shifts from c to c'=c+v.

Answer 2 (apparently saves Einstein's relativity): Because something happens to the observer so that what was previously d to him now appears to be d'=cd/(c+v):

http://www.pitt.edu/~jdnorton/teachi...ved/index.html
John Norton: "Every sound or light wave has a particular frequency and wavelength. In sound, they determine the pitch; in light they determine the color. Here's a light wave and an observer. If the observer were to hurry towards the source of the light, the observer would now pass wavecrests more frequently than the resting observer. That would mean that moving observer would find the frequency of the light to have increased (AND CORRESPONDINGLY FOR THE WAVELENGTH - THE DISTANCE BETWEEN CRESTS - TO HAVE DECREASED)."

https://groups.google.com/d/msg/sci....0/1rvrcjF4JlMJ
Tom Roberts: "Wavelength is not an intrinsic property of light, so it cannot be discussed independent of how it is measured. But it is clear that in vacuum the light ray itself is unchanged as it propagates. Differently moving observers will measure different wavelengths for a given light ray, because their MEASURING INSTRUMENTS are oriented differently in spacetime, and such a measurement inherently PROJECTS the light ray onto the measuring instrument."

Since the only physical factor that could change the "MEASURING INSTRUMENT" of the observer is the acceleration the observer experiences as he starts moving, special relativity turns out to be an acceleration-dependent theory - it has always been based (implicitly so far) on a third postulate guaranteeing that accelerations change the "MEASURING INSTRUMENT" so that the speed of light relative to the observer remains constant.

Einsteinians will have to justify the third postulate and demonstrate its effects quantitatively. Also, they will have to show that it is consistent with the other half of the Doppler effect where the frequency shift is triggered by the motion of the light source, not the observer.

Unless Einsteinians repair the theory in the way suggested above, the only reasonable conclusion is: Answer 1 is correct, Answer 2 is absurd.

Pentcho Valev
 




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