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:
“If with light head erect I sing,
Though all the muses lend their force,
From my poor love of anything,
The verse is weak and shallow as its source.
But if with bended neck I grope,
Listening behind me for my wit,
With faith superior to hope,
More anxious to keep back than forward it,”
—Henry David Thoreau (1817–1862)
“For as change is horror,
Virtue is really stubbornness
And only in the light of lost words
Can we imagine our rewards.”
—John Ashbery (b. 1927)
“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)