Light
Visible light (commonly referred to simply as light) is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. Visible light has a wavelength in the range of about 380 nanometres to about 740 nm – between the invisible infrared, with longer wavelengths and the invisible ultraviolet, with shorter wavelengths.
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Famous quotes containing the word light:
“In the early days of the world, the Almighty said to the first of our race “In the sweat of thy face shalt thou eat bread”; and since then, if we except the light and the air of heaven, no good thing has been, or can be enjoyed by us, without having first cost labour.”
—Abraham Lincoln (1809–1865)
“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)
“Nature made the day for exercise, work and seeing to one’s business; and ... it provides us with a candle, which is to say the bright and joyous light of the sun.”
—François Rabelais (1494–1553)