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:
“Like the old soldier of the ballad, I now close my military career and just fade away, an old soldier who tried to do his duty as God gave him the light to see that duty. Goodbye.”
—Douglas MacArthur (1880–1964)
“The night has a thousand eyes,
And the day but one;
Yet the light of the bright world dies
With the dying sun.”
—Francis William Bourdillon (1852–1921)
“I learn to affirm
Truth’s light at strange turns of the mind’s road,
wrong turns that lead
over the border into wonder....”
—Denise Levertov (b. 1923)