The observer walks along the fence. Relative to him, the posts have speed c, and the frequency he measures is f=c/L, where L is the distance between the posts. Now the observer starts running along the fence and his speed increases by v. Relative to him, the speed of the posts shifts from c to c'=c+v. This shift in the speed of the posts (relative to the obsevrer) causes the frequency he measures to shift from f=c/L to f'=c'/L=(c+v)/L.

The observer is (initially) at rest with respect the a wave source. Relative to him, the waves have speed c, and the frequency he measures is f=c/L, where L is the wavelength. Now the observer starts moving towards the source with (small) speed v. Relative to him, the speed of the wavecrests shifts from c to c'=c+v. This shift in the speed of the wavecrests (relative to the obsevrer) causes the frequency he measures to shift from f=c/L to f'=c'/L=(c+v)/L.

The above analogy between posts and wavecrests is implicit in all derivations of the Doppler frequency shift (moving observer). The proposition " the speed of the wavecrests shifts from c to c'=c+v " is obviously a necessary condition for the validity of the analogy. Shatter this proposition (that is, assume that the speed of the wavecrests does not shift from c to c'=c+v), and the analogy is no longer valid - one would have to look for another cause of the frequency shift.

The proposition " the speed of the wavecrests shifts from c to c'=c+v " is true for all waves but Einsteinians disagree about light waves. They believe that, although the crests of the light waves hit the moving observer more frequently than the observer at rest, this is not due to an increase in the speed of the wavecrests relative to the observer - something else must have caused the frequency shift.

If Einsteinians were honest, they would explicitly and officially denounce the analogy between posts and wavecrests for the case of light waves. Then they would explain, in both physical and mathematical terms, the "something else" which must be different from "increase in the speed of the wavecrests relative to the observer" but which nevertheless causes the frequency to shift in exactly the same way as if the "increase in the speed of the wavecrests relative to the observer" were the cause. Finally, Einsteinians would show, quantitatively, how the importance of the "something else" increases with the speed of the waves - for low-speed waves (e.g. sound waves) the "something else" is unimportant but for light waves its importance somehow becomes crucial.

Einsteinians have never been honest. Nowadays they are also frightened to death - their ship is sinking. Ordinary Einsteinians leave the sinking ship in panic:

http://parterre.com/wp-content/uploa.../nyco_rats.jpg

Einsteiniana's high priests leave the sinking ship in a well-organized way:

http://www.reset-italia.net/wp-conte...iam-andiam.jpg

The problem is that Einsteinians are leaving Augean stables for next generations to clean.

Pentcho Valev