Quote:
Originally posted by Blake:
Jeff (your turn now), by definition, index of refraction is the speed of light in a vacuum divided by the speed of light in a given medium. So when light enters a medium, its speed changes - it accelerates. Normally, though, the acceleration is negative (it slows down). One of the laws of physics (I'm paraphrasing) is that something that is at rest will stay that way unless something causes it to move. The same holds true for speed - an object will speed up or slow down if acted on by some force, such as friction. What the physicists did was bend the light waves in such a way as to decrease the resistance.
Blake,