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:
“Endeavor, as much as you can, to keep company with people above you.... Do not mistake, when I say company above you, and think that I mean with regard to their birth; that is the least consideration; but I mean with regard to their merit, and the light in which the world considers them.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
“The pursuit of perfection, then, is the pursuit of sweetness and light.... He who works for sweetness and light united, works to make reason and the will of God prevail.”
—Matthew Arnold (1822–1888)
“Thus he struggled, by every method, to keep his light shining before men. Surely the lighthouse-keeper has a responsible, if an easy, office. When his lamp goes out, he goes out; or, at most, only one such accident is pardoned.”
—Henry David Thoreau (1817–1862)