Consider the sun, It gives off light, about every second or ...maybe it was millisecond that light travels it moves more or less a foot.
Now, considering everything has to have force applied to move, what propells light that fast..from any source of which light is rendered light goes faster than a human can move. So why can light as small as it is move so fast over so much distance without any seeming propellsion where as a human can only move slowly?
