There is absolute truth in science. Of the following two statements one is absolutely true, the other is false:

(A) The speed of light, as measured by the observer (receiver), varies with the speed of the emitter.

(B) The speed of light, as measured by the observer (receiver), does not vary with the speed of the emitter.

Einstein hesitated between (A), a tenet of Newton's theory, and (B), a tenet of the ether theory, and finally chose (B) as his 1905 second postulate:

Einstein: "I introduced the principle of the constancy of the velocity of light, which I borrowed from H. A. Lorentz's theory of the stationary luminiferous ether..." https://en.wikipedia.org/wiki/Lorentz_ether_theory

The true statement is (A). The speed of light does vary with the speed of the emitter, as posited by Newton's theory and proved by the Michelson-Morley experiment in 1887 (prior to the introduction of the length-contraction fudge factor):

https://qph.cf2.quoracdn.net/main-qimg-f10f1c25528a4e5edc9bae200640f31c-pjlq

"Emission theory, also called emitter theory or ballistic theory of light, was a competing theory for the special theory of relativity, explaining the results of the Michelson–Morley experiment of 1887...The name most often associated with emission theory is Isaac Newton. In his corpuscular theory Newton visualized light "corpuscles" being thrown off from hot bodies at a nominal speed of c with respect to the emitting object, and obeying the usual laws of Newtonian mechanics, and we then expect light to be moving towards us with a speed that is offset by the speed of the distant emitter (c ± v)." https://en.wikipedia.org/wiki/Emission_theory

Banesh Hoffmann, Einstein's co-author, admits that, originally ("without recourse to contracting lengths, local time, or Lorentz transformations"), the Michelson-Morley experiment was compatible with Newton's variable speed of light, c'=c±v, and incompatible with the constant speed of light, c'=c:

"Moreover, if light consists of particles, as Einstein had suggested in his paper submitted just thirteen weeks before this one, the second principle seems absurd: A stone thrown from a speeding train can do far more damage than one thrown from a train at rest; the speed of the particle is not independent of the motion of the object emitting it. And if we take light to consist of particles and assume that these particles obey Newton's laws, they will conform to Newtonian relativity and thus automatically account for the null result of the Michelson-Morley experiment without recourse to contracting lengths, local time, or Lorentz transformations. Yet, as we have seen, Einstein resisted the temptation to account for the null result in terms of particles of light and simple, familiar Newtonian ideas, and introduced as his second postulate something that was more or less obvious when thought of in terms of waves in an ether." Banesh Hoffmann, Relativity and Its Roots, p.92 https://www.amazon.com/Relativity-Its-Roots-Banesh-Hoffmann/dp/0486406768

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Pentcho Valev

Doppler effect - when an observer moves towards a stationary light source: https://www.youtube.com/watch?v=bg7O4rtlwEE.

(A) The motion of the observer does not change the wavelength (distance between subsequent light pulses), so frequency and speed of light vary proportionally for the observer, in violation of Einstein's relativity.

(B) The motion of the observer changes the wavelength (distance between subsequent light pulses) so that the speed of light can gloriously remain constant for the moving observer.

The true statement is (A):

"The wavelength is staying the same in this case." https://www.youtube.com/watch?v=MHepfIIsKcE

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

"Vo is the velocity of an observer moving towards the source. This velocity is independent of the motion of the source. Hence, the velocity of waves relative to the observer is c + Vo. [...] The motion of an observer does not alter the wavelength. The increase in frequency is a result of the observer encountering more wavelengths in a given time." http://a-levelphysicstutor.com/wav-doppler.php

The statement (B) is obviously absurd. This discourages Einsteinians from discussing it explicitly but cynical ideologues do teach it:

Professor Martin White, UC Berkeley: "...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)." http://w.astro.berkeley.edu/~mwhite/darkmatter/dopplershift.html

Kip Thorne: "If you move toward the [light] source, you see the wavelength shortened but you don't see the speed changed." https://youtu.be/mvdlN4H4T54?t=296

John Norton: "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)." http://www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/big_bang_observed/index.html

More here: https://twitter.com/pentcho_valev

Pentcho Valev

On Wednesday, January 4, 2023 at 3:13:15 PM UTC-8, Pentcho Valev wrote:
> There is absolute truth in science. Of the following two statements one is absolutely true, the other is false:
>
> (A) The speed of light, as measured by the observer (receiver), varies with the speed of the emitter.
>
> (B) The speed of light, as measured by the observer (receiver), does not vary with the speed of the emitter.
>
> Einstein hesitated between (A), a tenet of Newton's theory, and (B), a tenet of the ether theory, and finally chose (B) as his 1905 second postulate:
>
> Einstein: "I introduced the principle of the constancy of the velocity of light, which I borrowed from H. A. Lorentz's theory of the stationary luminiferous ether..." https://en.wikipedia.org/wiki/Lorentz_ether_theory
>
> The true statement is (A). The speed of light does vary with the speed of the emitter, as posited by Newton's theory and proved by the Michelson-Morley experiment in 1887 (prior to the introduction of the length-contraction fudge factor):
>
> https://qph.cf2.quoracdn.net/main-qimg-f10f1c25528a4e5edc9bae200640f31c-pjlq
>
> "Emission theory, also called emitter theory or ballistic theory of light, was a competing theory for the special theory of relativity, explaining the results of the Michelson–Morley experiment of 1887...The name most often associated with emission theory is Isaac Newton. In his corpuscular theory Newton visualized light "corpuscles" being thrown off from hot bodies at a nominal speed of c with respect to the emitting object, and obeying the usual laws of Newtonian mechanics, and we then expect light to be moving towards us with a speed that is offset by the speed of the distant emitter (c ± v)." https://en.wikipedia.org/wiki/Emission_theory
>
> Banesh Hoffmann, Einstein's co-author, admits that, originally ("without recourse to contracting lengths, local time, or Lorentz transformations"), the Michelson-Morley experiment was compatible with Newton's variable speed of light, c'=c±v, and incompatible with the constant speed of light, c'=c:
>
> "Moreover, if light consists of particles, as Einstein had suggested in his paper submitted just thirteen weeks before this one, the second principle seems absurd: A stone thrown from a speeding train can do far more damage than one thrown from a train at rest; the speed of the particle is not independent of the motion of the object emitting it. And if we take light to consist of particles and assume that these particles obey Newton's laws, they will conform to Newtonian relativity and thus automatically account for the null result of the Michelson-Morley experiment without recourse to contracting lengths, local time, or Lorentz transformations. Yet, as we have seen, Einstein resisted the temptation to account for the null result in terms of particles of light and simple, familiar Newtonian ideas, and introduced as his second postulate something that was more or less obvious when thought of in terms of waves in an ether." Banesh Hoffmann, Relativity and Its Roots, p.92 https://www.amazon.com/Relativity-Its-Roots-Banesh-Hoffmann/dp/0486406768
>
> See more here: https://twitter.com/pentcho_valev
>
> Pentcho Valev

Light has its own motion. Just as the atom does.
They can move toward or away from one another
each having their own speed. They both obey the
speed limit. but separately they can add. That is
their convergence divergence in space.

Mitchell Raemsch

mitchr...@gmail.com wrote:

>> Pentcho Valev
>
> Light has its own motion. Just as the atom does.
> They can move toward or away from one another each having their own
> speed. They both obey the speed limit. but separately they can add. That
> is their convergence divergence in space.

do true indeed, but those war_criminals nazists, killing people on record,
as that gain of function bio_weapon fabricator, trudeau castro justin, the
ursula, bidan and trump, boris johnson, hancock etc, pushing the killing
serum for profit, etc, why are those not yet arrested and executed? They
are murderers, whereas Mengele and Hitler, are a picnic compared to these
murderers.