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:
“O thou immortal light and heat!
Whose hand so shines through all this frame,
That by the beauty of the seat,
We plainly see who made the same.
Seeing thy seed abides in me,
Dwell thou in it, and I in thee.”
—Henry Vaughan (1622–1695)
“Think what a mean and wretched place this world is; that half the time we have to light a lamp that we may see to live in it. This is half our life. Who would undertake the enterprise if it were all?”
—Henry David Thoreau (1817–1862)
“The march interrupted the light afternoon.
Cars stopped dead, children began to run,
As out of the street-shadow into the sun
Discipline strode....”
—Philip Larkin (1922–1986)