How "Fast" is the Speed of Light?
Light
travels at a constant, finite speed of 186,000 mi/sec. A traveler, moving
at the speed of light, would circum-navigate the equator approximately
7.5 times in one second. By comparison, a traveler in a jet aircraft,
moving at a ground speed of 500 mph, would cross the continental U.S.
once in 4 hours.