In 1887 the Michelson-Morley experiment unequivocally confirmed the variable speed of light predicted by Newton's emission theory of light, and refuted the constant (independent of the speed of the light source) speed of light predicted by the ether theory. However FitzGerald and Lorentz introduced, ad hoc, "length contraction" in order to make the experiment confirm the constant speed of light and refute the variable speed of light:
http://www.amazon.com/Relativity-Its-Roots-Banesh-Hoffmann/dp/0486406768 "Relativity and Its Roots" By Banesh Hoffmann: "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."
So in 1905 Einstein introduced his false light postulate (the speed of light is independent of the speed of the light source) without any problem. Much later Einsteinians were compelled to introduce "length elongation" in order to explain the following absurd consequence of the false postulate:
http://hyperphysics.phy-astr.gsu.edu/Hbase/Relativ/bugrivet.html "The bug-rivet paradox is a variation on the twin paradox and is similar to the pole-barn paradox.....The end of the rivet hits the bottom of the hole before the head of the rivet hits the wall. So it looks like the bug is squashed.....All this is nonsense from the bug's point of view. The rivet head hits the wall when the rivet end is just 0.35 cm down in the hole! The rivet doesn't get close to the bug....The paradox is not resolved."
It seems special relativity is doomed and yet... if length contraction is powerless in this case, nothing can stop Einsteinians from ad hoc introducing length elongation:
http://brianclegg.blogspot.com/2011_11_01_archive.html Brian Clegg: "Here's the scenario. We've got a table with a 10mm deep hole in it. At the bottom of the hole a beetle is happily beetling about, unaware that we are about to fire a rivet into the hole. The good news is that the shank of the rivet, the bit that will go into the hole, is only 8mm long, leaving room for our (rather small) beetle to feel safe and snug. (...) Let's follow the event from the beetle's viewpoint. Down comes the rivet and slams into the table. At the moment before the impact the rivet is still just 5mm long as far as the bug is concerned. But here's the thing. Just because the head of the rivet has come to a sudden stop doesn't mean the whole rivet does. A wave has to pass along the rivet to its end saying 'Stop!' The end of the rivet will just keep on going until this wave, typically travelling at the speed of sound, reaches it. That fast-moving end will crash into the beetle long before the wave arrives. It will then send a counter wave back up the rivet and after a degree of shuddering will eventually settle down as an 8 mm rivet in a 10 mm hole. Too late, though, for that bug. Isn't physics great?"
Clearly Einstein's 1905 false light postulate is unfalsifiable. Any time some experiment or argument shows that the speed of light is variable, Einsteinians immediately change some length so that the speed of light can remain constant. When the observer starts moving towards the source of the light and, as a result, the wavecrests start hitting him more frequently, this does not mean that the speed of the waves relative to him has increased. No! Rather, the wavelength has decreased so that the speed of the waves relative to the observer can remain constant, Divine Einstein, yes we all believe in relativity, relativity, relativity:
http://www.pitt.edu/~jdnorton/teaching/HPS_0410/chapters/big_bang_observed/index.html 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)."