Light
A source of light can have many colors mixed and in different amounts (intensities). A rainbow, or prism, sends the different frequencies in different directions, making them individually visible at different angles. A graph of the intensity plotted against the frequency (showing the amount of each color) is the frequency spectrum of the light. When all the visible frequencies are present in equal amounts, the perceived color of the light is white, and the spectrum is a flat line. Therefore, flat-line spectrums in general are often referred to as white, whether they represent light or something else
Read more about this topic: Frequency Spectrum
Famous quotes containing the word light:
“Signal smokes, war drums, feathered bonnets against the western sky. New messiahs, young leaders are ready to hurl the finest light cavalry in the world against Fort Stark. In the Kiowa village, the beat of drums echoes in the pulsebeat of the young braves. Fighters under a common banner, old quarrels forgotten, Comanche rides with Arapaho, Apache with Cheyenne. All chant of war. War to drive the white man forever from the red man’s hunting ground.”
—Frank S. Nugent (1908–1965)
“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)
“Like a poet hidden
In the light of thought,
Singing hymns unbidden,
Till the world is wrought
To sympathy with hopes and fears it heeded not:”
—Percy Bysshe Shelley (1792–1822)