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:
“But thou beneath the sad and heavy line
Of death, doth waste all senseless, cold, and dark;
Where not so much as dreams of light may shine,
Nor any thought of greenness, leaf, or bark.”
—Henry Vaughan (1622–1695)
“Do we write books so that they shall merely be read? Don’t we also write them for employment in the household? For one that is read from start to finish, thousands are leafed through, other thousands lie motionless, others are jammed against mouseholes, thrown at rats, others are stood on, sat on, drummed on, have gingerbread baked on them or are used to light pipes.”
—G.C. (Georg Christoph)
“The light is there, and colors surround us. However, if there were no light nor colors in our own eye, we wouldn’t perceive such things outside of us.”
—Johann Wolfgang Von Goethe (1749–1832)