# What is the speed of light in miles per hour?

The speed of light is 670, 616, 629 miles per hour. This is really fast compared to the speed of sound, which is only about 761 mph. This can help explain why we experience a delay between lightning and thunder in the sky, while in reality they happen at the same time, only that the light gets to us faster than the sound.
Q&A Related to "What is the speed of light in miles per hour?"
 We don't know what "hour second" means, and have a nagging suspicion. that it's quite meaningless. In vacuum, the speed of light is roughly. 186,282 miles per second. 670,615,200 http://wiki.answers.com/Q/What_is_the_speed_of_lig...
 The speed of light travels at 670,616,629 miles per hour. The speed of sound is 761 mph at sea level. http://www.kgbanswers.com/what-is-the-speed-of-lig...
 1. Know that a knot is about 15 percent faster than going 1 mile per hour. So if a car is going 1 mph and a boat is sailing at 1 knot, the boat will be going slightly faster. 2. Convert http://www.ehow.com/how_5498759_convert-speed-mile...
 The speed of light is 299,792,458 meters per http://www.chacha.com/question/what-is-the-speed-o...