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:
“I think no woman I have had ever gave me so sweet a moment, or at so light a price, as the moment I owe to a newly heard musical phrase.”
—Stendhal [Marie Henri Beyle] (1783–1842)
“When the light was extinguished,
She covered me warm,
And she prayed to the angels
To keep me from harm—”
—Edgar Allan Poe (1809–1849)
“Irrational streams of blood are staining earth;
Empedocles has thrown all things about;
Hector is dead and there’s a light in Troy;
We that look on but laugh in tragic joy.”
—William Butler Yeats (1865–1939)