Discussion:
BINGO THE EINSTEINIANO SAVES EINSTEIN FROM DOPPLER
(trop ancien pour répondre)
Pentcho Valev
2015-07-02 20:41:34 UTC
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"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."

http://farside.ph.utexas.edu/teaching/315/Waveshtml/node41.html
"Thus, the moving observer sees a wave possessing the same wavelength (...) but a different frequency (...) to that seen by the stationary observer."

http://physics.bu.edu/~redner/211-sp06/class19/class19_doppler.html
"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."

Bingo the Einsteiniano: No! The moving observer does not see a wave possessing the same wavelength, and relative to him the waves do not travel at a higher speed v'=v+vO, Divine Einstein, yes we all believe in relativity, relativity, relativity:

http://www.lp2i-poitiers.fr/doc/aps/albatros/uk/pages/doppleffet.html
Bingo the Einsteiniano: "The observer moves closer to the source. The wave received has a shorter wavelength (higher frequency) than that emitted by the source. The observer moves away from the source. The wave received has a longer wavelength (lower frequency) than that emitted by the source. Divine Einstein! Yes we all believe in relativity, relativity, relativity!"

http://www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/big_bang_observed/index.html
Bingo the Einsteiniano: "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). Divine Einstein! Yes we all believe in relativity, relativity, relativity!"

http://astro.berkeley.edu/~mwhite/darkmatter/dopplershift.html
Bingo the Einsteiniano: "...the sound waves have a fixed wavelength (distance between two crests or two troughs) only if you're not moving relative to the source of the sound. If you are moving away from the source (or equivalently it is receding from you) then each crest will take a little longer to reach you, and so you'll perceive a longer wavelength. Similarly if you're approaching the source, then you'll be meeting each crest a little earlier, and so you'll perceive a shorter wavelength. (...) The same principle applies for light as well as for sound. In detail the amount of shift depends a little differently on the speed, since we have to do the calculation in the context of special relativity. But in general it's just the same: if you're approaching a light source you see shorter wavelengths (a blue-shift), while if you're moving away you see longer wavelengths (a red-shift). Divine Einstein! Yes we all believe in relativity, relativity, relativity!"


Bingo the Clowno

Pentcho Valev
Pentcho Valev
2015-07-04 19:19:49 UTC
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In order for the speed of light to remain constant, the moving observer (receiver) should somehow change the wavelength of the incoming light - otherwise the frequency shift can only be explained in terms of the shift in the speed of light relative to the observer, which is fatal for Einstein's relativity of course. The problem is that the idea that the speed of light remains independent of the speed of the observer, which can only happen if the motion of the observer miraculously changes the wavelength of the incoming light, is so idiotic that even Einstein had problems with adopting it:

http://www.aip.org/history/exhibits/einstein/essay-einstein-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."

Many Einsteinians reject the assumption that the motion of the observer changes the wavelength of the incoming light and so inadvertently refute 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:

Loading Image... (stationary receiver)

Loading Image... (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." [end of quotation]

That is, the speed of the pulses relative to the stationary receiver is c = 3d/t, but relative to the moving receiver is c' = 4d/t = (4/3)c, where d is the distance between subsequent pulses and t is "the time it takes the source to emit three pulses".

Clearly the speed of light (relative to the observer) is NOT independent of the speed of the observer, which means that Einstein's 1905 constant-speed-of-light postulate is false.

Pentcho Valev
Pentcho Valev
2015-07-05 04:45:09 UTC
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http://physics.ucsd.edu/students/courses/summer2011/session1/physics2c/Waves.pdf
UC San Diego: "Doppler effect (...) Let u be speed of source or observer (...) Doppler Shift: Moving Observer. Shift in frequency only, wavelength does not change. Speed observed = v+u (...) Observed frequency shift f'=f(1±u/v)"

Bingo the Einsteiniano: No! This is for sound, not for light! For light, speed observed = v = c, Divine Einstein, yes we all believe in relativity, relativity, relativiity, and the motion of the observer does change the wavelength so that the observed frequency shift can remain f'=f(1±u/v)!

The fact that the motion of the observer gloriously changes the wavelength of the incoming light is always very exciting. Initially Bingos sing quietly but then the ecstasy gets uncontrollable - Bingos tumble to the floor, start tearing their clothes and go into convulsions:


Michio Kaku, Brian Cox, Neil deGrasse Tyson, Brian Greene, Lisa Randall: "Light travels at the same speed no matter how you look at it. No matter how I move relative to you light travels at the same speed. No matter who is doing the measurement and no matter what direction you are moving the speed of light is the same. The speed of light is the same no matter what direction or how fast... As you travel faster time slows down. Everything slows down. Everything slows down. Time slows down when you move. Time passes at a different rate. Clocks run slow. It's a monumental shift in how we see the world. It's a beautiful piece of science. It's a beautifully elegant theory. It's a beautiful piece of science. It's a beautiful piece..."

Pentcho Valev

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