Einstein's 1905 false constant-speed-of-light postulate:

Albert Einstein, ON THE ELECTRODYNAMICS OF MOVING BODIES, 1905: "...light is always propagated in empty space with a definite velocity c which is independent of the state of motion of the emitting body." http://www.fourmilab..ch/etexts/einstein/specrel/www/

If interpreted correctly, the Doppler effect directly refutes the postulated independence from "the state of motion of the emitting body". Here are incorrect interpretations - Einstein's relativity is saved by the false ad hoc assumption that the wavelength or the distance between subsequent pulses is changed by the moving light source:

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.fisica.net/relatividade/s...ry_of_time.pdf

Albert Einstein Institute: "We will start with a very simple set-up, which you can see in the following animation. On the right-hand side, drawn in green, there is a sender that emits pulses in regular succession. On the left-hand side there is a receiver, drawn in blue. The pulses themselves are drawn in red, and they all travel at the same speed from right to left. Everytime the sender emits a new pulse, a yellow indicator light flashes once. Likewise, a flashing light indicates when a pulse has reached the receiver:

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

Next, let us look at a slightly different situation, where the source is moving towards the detector. 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:

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

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. If we compare the rates at which the indicator lights at the receiver and at the sender are flashing, we find that the indicator light at the receiver is flashing faster." [END OF QUOTATION] http://www.einstein-online.info/spotlights/doppler

Einsteinians make the following assumption above, which is essentially identical to Einstein's 1905 constant-speed-of-light postulate:

Assumption 1: "The motion of the sender does not influence the speed at which the pulses travel."

Assumption 1 goes hand in hand with another assumption:

Assumption 2: "The distance between successive pulses is now smaller than when both sender and receiver were at rest."

Assumption 2 is false - the pulses do not bunch up when the source (sender) is moving. If they did, by measuring the (variable) distance between the pulses, an observer in the frame of the source would know whether he is moving or at rest, which contradicts the principle of relativity.

Since Assumption 2 is false, Assumption 1 is false as well. If the speed of the moving source is v, the speed of the light relative to the receiver is c'=c+v, in violation of Einstein's relativity.

Pentcho Valev