Light
Light propagates at 299,792,458 m/s, often approximated as 300,000 kilometres per second or 186,000 miles per second. The speed of light (or c) is the speed of all massless particles and associated fields in a vacuum, and it is the upper limit on the speed at which energy, matter, and information can travel.
Read more about this topic: Motion (physics)
Famous quotes containing the word light:
“Modern dancers are inconvenienced by a local ordinance requiring the passage of visible light between partners.”
—State of Utah, U.S. public relief program (1935-1943)
“It is the essence of truth that it is never excessive. Why should it exaggerate? There is that which should be destroyed and that which should be simply illuminated and studied. How great is the force of benevolent and searching examination! We must not resort to the flame where only light is required.”
—Victor Hugo (1802–1885)
“The food of thy soul is light and space; feed it then on light and space. But the food of thy body is champagne and oysters; feed it then on champagne and oysters; and so shall it merit a joyful resurrection, if there is any to be.”
—Herman Melville (1819–1891)