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:
“they appear youthful, rare
as the light of a happy eye, live with the grace
of all that in the mind is fleckless, free and
naturally to be desired.”
—William Carlos Williams (1883–1963)
“When goose down is sent a thousand miles, the gift may be light but the sentiment is weighty.”
—Chinese proverb.
“And for tired eyes every light is too bright, and for tired lips every breath too heavy, and for tired ears every word too much.”
—Georg Büchner (1813–1837)