After reading Learjet's above reply from the "coldest place in the universe" topic, it got me wondering... If the speed of light slows as it passes through a glass of water how come we don't see it as a different color? or does it regain it's momentum after departing the water? Or have I just misread what was being said and the speed of light doesn't change, or just completely screwed up my thoughts??
Cheers guys and gals