Divine Albert's Divine Theory is surrounded by silence nowadays - only Einstein's sex life is discussed. Famous Einsteinians are silent, Science and Nature are silent, even the two Brians (Greene and Cox) are silent. And there are embarrassing hints:
"Scientists are now questioning that the speed of light is constant and some believe that fairly soon quantum theory and the theory of relativity could be fighting it out to determine which theory will capture the crown of scientific consensus."
http://www.qcsunonline.com/story/2017/04/26/opinion/science-has-failed-in-obligations/18216.html
"Today the speed of light, or c as it's commonly known, is considered the cornerstone of special relativity - unlike space and time, the speed of light is constant, independent of the observer. [...] Quantum field theory says that a vacuum is never really empty: it's filled with elementary particles, rapidly popping in and out of existence. These particles create electromagnetic ripples along the way, the hypothesis goes, and could potentially cause variations in the speed of light. Studies into these ideas are ongoing, and we don't know for sure one way or the other yet. For now, the speed of light remains the same as it has for centuries, constant and fixed... but watch this space."
http://www.sciencealert.com/why-is-the-speed-of-light-the-speed-of-light
Alas, Einsteinians, the speed of light is VARIABLE, and this is OBVIOUS. Any correct interpretation of the Doppler effect shows that THE SPEED OF LIGHT VARIES WITH THE SPEED OF THE OBSERVER. Consider a light source emitting a series of pulses equally distanced from one another. A stationary observer (receiver) measures the frequency of the pulses:
http://www.einstein-online.info/images/spotlights/doppler/doppler_static.gif
The observer starts moving with constant speed towards the light source - the measured frequency increases:
http://www.einstein-online.info/images/spotlights/doppler/doppler_detector_blue.gif
The following quotation is relevant:
http://www.einstein-online.info/spotlights/doppler
Albert Einstein Institute: "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."
Since "four pulses are received in the time it takes the source to emit three pulses", the speed of the pulses relative to the moving observer (receiver) is (4/3)c, in violation of Einstein's relativity.
When the initially stationary observer starts moving towards the light source with speed v, the speed of the light relative to him becomes c'=c+v, in violation of Einstein's relativity, and the frequency he measures shifts accordingly - from f=c/λ to f'=c'/λ=(c+v)/λ:
http://physics.bu.edu/~redner/211-sp06/class19/class19_doppler.html
"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."
http://a-levelphysicstutor.com/wav-doppler.php
"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://www.hep.man.ac.uk/u/roger/PHYS10302/lecture18.pdf
"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."
Pentcho Valev