http://galileoandeinstein.physics.virginia.edu/lectures/michelson.html
Michael Fowler, University of Virginia: "There is another obvious possibility, which is called the emitter theory: the light travels at 186,300 miles per second relative to the source of the light. The analogy here is between light emitted by a source and bullets emitted by a machine gun. The bullets come out at a definite speed (called the muzzle velocity) relative to the barrel of the gun. If the gun is mounted on the front of a tank, which is moving forward, and the gun is pointing forward, then relative to the ground the bullets are moving faster than they would if shot from a tank at rest. The simplest way to test the emitter theory of light, then, is to measure the speed of light emitted in the forward direction by a flashlight moving in the forward direction, and see if it exceeds the known speed of light by an amount equal to the speed of the flashlight. Actually, this kind of direct test of the emitter theory only became experimentally feasible in the nineteen-sixties. It is now possible to produce particles, called neutral pions, which decay each one in a little explosion, emitting a flash of light. It is also possible to have these pions moving forward at 185,000 miles per second when they self destruct, and to catch the light emitted in the forward direction, and clock its speed. It is found that, despite the expected boost from being emitted by a very fast source, the light from the little explosions is going forward at the usual speed of 186,300 miles per second. In the last century, the emitter theory was rejected because it was thought the appearance of certain astronomical phenomena, such as double stars, where two stars rotate around each other, would be affected. Those arguments have since been criticized, but the pion test is unambiguous. The definitive experiment was carried out by Alvager et al., Physics Letters 12, 260 (1964)."
If the Alväger experiment is the most unambiguous test confirming Einstein's 1905 light postulate and refuting the variable speed of light predicted by Newton's emission theory of light, then tests of the postulate as a whole are all fraud. Here is Alväger's paper:
http://mysite.verizon.net/cephalobus_alienus/papers/Alvager_et_al_1964.pdf
Test of the second postulate of special relativity in the GeV region, Alväger, T.; Farley, F. J. M.; Kjellman, J.; Wallin, L., 1964, Physics Letters, vol. 12, Issue 3, pp.260-262
High energy particles bump into a beryllium target and as a result gamma photons leave the target and travel at c relative to the target. Antirelativists do not see how this can refute the emission theory but Einsteinians do. They teach that initially a pion is generated inside the beryllium target and this pion travels at 0.9999c inside the target and decays into two gamma photons inside the target and therefore this pion is a moving source of light. And since the source travels at c inside the target, the gamma photons must travel at 2c if the emission theory is correct but they don't - they travel at c as gloriously predicted by Divine Albert's Divine Theory!
If the emission theory had predicted that the products of the disintegration of the pion should travel at 2c, it would be the silliest theory in the history of science. The straw man built by Alväger & Co is obviously idiotic, and yet the experiment is cited as the most convincing confirmation of Einstein's 1905 constant-speed-of-light postulate. A postulate that needs such kind of support cannot be true.
Pentcho Valev