(August 10, 2010 at 5:00 pm)Tiberius Wrote: The speed of light isn't constant. The speed of light through a certain material is constant, but the speed of light generally can vary massively.
The speed of light through a vacuum is believed to be the speed limit of the universe (i.e. the fastest you can go relative to space-time). However if a light photon goes from a vacuum into water, it will slow down. Scientists can even stop light momentarily: http://news.bbc.co.uk/1/hi/sci/tech/3308109.stm
No sure how this affects your question; I just wanted to point out the correction.
Sure, I should have been more clear, I am strictly speaking of light in a vacuum being constant, more to discuss what this might be a result of, and moreover the root cause of all of those actions.
My religion is the understanding of my world. My god is the energy that underlies it all. My worship is my constant endeavor to unravel the mysteries of my religion. 
