Einstein's 1905 constant-speed-of-light postulate has two closely related aspects:
1. Any light travelling in a vacuum has the same constant speed, c = 299,792 kilometers per second, as measured by any observer.
2. If the observer were to hurry towards the light source (his speed changes), he would again measure the same speed of the incoming light, c = 299,792 kilometers per second.
As I have already shown in my previous posting, the first aspect has been disproved by experiments. Below the Albert Einstein Institute inadvertently refutes the second aspect by showing that the speed of light varies with the speed of the observer (receiver):
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:
http://www.einstein-online.info/images/spotlights/doppler/doppler_static.gif (stationary receiver)
http://www.einstein-online.info/images/spotlights/doppler/doppler_detector_blue.gif (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]
Since "four pulses are received in the time it takes the source to emit three pulses", the speed of the pulses relative to the receiver (which has started moving towards the light source) is greater than their speed relative to the source. The second aspect is false.
Actually any correct interpretation of the Doppler effect disproves, explicitly or implicitly, the second aspect - the speed of light relative to the observer does vary with the speed of the observer, in violation of Einstein's relativity:
http://www.youtube.com/watch?v=bg7O4rtlwEE
"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://www.youtube.com/watch?v=SC0Q6-xt-Xs
"Doppler effect - when an observer moves away from a stationary source. ...the velocity of the wave relative to the observer is slower than that when it is still."
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://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."
Pentcho Valev