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:
“Think what a mean and wretched place this world is; that half the time we have to light a lamp that we may see to live in it. This is half our life. Who would undertake the enterprise if it were all?”
—Henry David Thoreau (1817–1862)
“We not only grew up on Be-Bop; Be-Bop raised us. For my generation, Be-Bop came on like a light bulb going flash behind the eyes. For us, it was not only an intellectual movement, but a way of life. We walked, dressed, and rapped Be-Bop.”
—Ishmael Reed (b. 1938)
“Its quick silver bell beating, beating
And down the dark one ruby flare
Pulsing out red light like an artery,”
—Karl Shapiro (b. 1913)