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:
“The churches ... have lost much of their authority over youth because they have refused to re-examine their religious sanctions and their dogmatic preaching in the light of modern physiology, psychology and sociology.”
—Agnes E. Meyer (1887–1970)
“The popular definition of tragedy is heavy drama in which everyone is killed in the last act, comedy being light drama in which everyone is married in the last act.”
—George Bernard Shaw (1856–1950)
“Accursed who brings to light of day
The writings I have cast away.”
—William Butler Yeats (1865–1939)