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:
“Stern Daughter of the Voice of God!
O Duty! if that name thou love,
Who art a light to guide, a rod
To check the erring, and reprove;”
—William Wordsworth (1770–1850)
“If men could menstruate ... clearly, menstruation would become an enviable, boast-worthy, masculine event: Men would brag about how long and how much.... Sanitary supplies would be federally funded and free. Of course, some men would still pay for the prestige of such commercial brands as Paul Newman Tampons, Muhammed Ali’s Rope-a-Dope Pads, John Wayne Maxi Pads, and Joe Namath Jock Shields—”For Those Light Bachelor Days.””
—Gloria Steinem (b. 1934)