http://quantumweird.wordpress.com/quantum-weirdness-a-matter-of-relativity-part-5/
I read your interesting linked article. I was wondering if the relativistic effects the author attributes to photons travelling at c would be suspended if they were forced to travel slower than c, as in a solid medium. The last paragraph seems to indicate that solids don’t effect the behavior. I suspect that’s related to the strange fact that, even when slowed down, a photon can instantly “accelerate” back to c when it leaves the slow medium.