The Best Cool Facts About The Speed Of Light References
The Best Cool Facts About The Speed Of Light References . It is an exact mathematical constant , because the meter was redefined in the international system of units (si) in 1983 as the distance traveled by light in a vacuum in 1/299,792,458 of a second. In terms of seconds, light travels at around 300,000 kilometers per second or 186,000 miles per second in a vacuum. Light from www.slideshare.net Web the value of 299,792,458 meters per second (186,282 miles per second) is the speed of light in a vacuum. In water, the speed of light is slower, at 225,000 km / 139,808 mi per second, and 200,000 km. Web excerpt from the december 2, 1972 issue of science news.