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:
“Smokers, male and female, inject and excuse idleness in their lives every time they light a cigarette.”
—Colette [Sidonie Gabrielle Colette] (1873–1954)
“We saw one schoolhouse in our walk, and listened to the sounds which issued from it; but it appeared like a place where the process, not of enlightening, but of obfuscating the mind was going on, and the pupils received only so much light as could penetrate the shadow of the Catholic Church.”
—Henry David Thoreau (1817–1862)
“Go where he will, the wise man is at home,
His hearth the earth,—his hall the azure dome;
Where his clear spirit leads him, there’s his road,
By God’s own light illumined and foreshadowed.”
—Ralph Waldo Emerson (1803–1882)