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:
“The light that radiates from the great novels time can never dim, for human existence is perpetually being forgotten by man and thus the novelists’ discoveries, however old they may be, will never cease to astonish.”
—Milan Kundera (b. 1929)
“... by desiring what is perfectly good, even when we don’t quite know what it is and cannot do what we would, we are part of the divine power against evil—widening the skirts of light and making the struggle with darkness narrower.”
—George Eliot [Mary Ann (or Marian)
“Ye are the light of the world.”
—Bible: New Testament Jesus, in Matthew, 5:14.
From the Sermon on the Mount.