The Interaction of Light With Matter
There are three types of possible interactions between a system of atoms and light that are of interest:
Read more about this topic: Population Inversion
Famous quotes containing the words interaction, light and/or matter:
“The act of putting into your mouth what the earth has grown is perhaps your most direct interaction with the earth.”
—Frances Moore Lappé (b. 1944)
“Disease can never be conquered, can never be quelled by emotion’s wailful screaming or faith’s cymballic prayer. It can only be conquered by the energy of humanity and the cunning in the mind of man. In the patience of a Curie, in the enlightenment of a Faraday, a Rutherford, a Pasteur, a Nightingale, and all other apostles of light and cleanliness, rather than of a woebegone godliness, we shall find final deliverance from plague, pestilence, and famine.”
—Sean O’Casey (1884–1964)
“If a being suffers there can be no moral justification for refusing to take that suffering into consideration. No matter what the nature of the being, the principle of equality requires that its suffering be counted equally with the like suffering—insofar as rough comparisons can be made—of any other being.”
—Peter Singer (b. 1946)