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:
“When I could not see the light with my blind eyes, I blamed not my eyes, but the sun.”
—Jerome (c. 340–420)
“What will you say, when I tell you truly, that I cannot possibly read our countryman Milton through. I acknowledge him to have most sublime passages, some prodigious flashes of light; but then you must acknowledge that light is often followed by darkness visible, to use his own expression.”
—Philip Dormer Stanhope, 4th Earl Chesterfield (1694–1773)
“Spades take up leaves
No better than spoons,
And bags full of leaves
Are light as balloons.”
—Robert Frost (1874–1963)