What is the measure of the distance that light travels in a single year in a vacuum?
Oh, the looks on their faces. There's light in a vacuum??
Melissa: "Light in a vacuum? I don't even know how fast dirt travels in a vacuum!"
Ah....not that kind of vacuum.
Then William said as the light bulb goes off in his head, "Oh, a vacuum like a black hole?"
HEY! Maybe he is learning something at this school!! YES!!