Nothing is faster than the speed of light, right? Hmmm? Or is there? Sometimes when I lay awake at night, wondering how to think, I come up with some doozies.
Suppose we dangle a large, solid, concrete block in a swimming pool at, say, the six foot depth. It’s a 3’ x 3’ x 3’ cube. Now let’s suppose we’re using a crane to easily move it around in the water.
Okay, here’s the question. If I move the block exactly three feet in just half a second, how fast will water fill the space where it used to be?
Is light that fast? Or faster? Or the same speed?
Aren’t you glad your eighth-grade math teacher didn’t lay awake at night?