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:
“Our rural village life was a purifying, uplifting influence that fortified us against the later impacts of urbanization; Church and State, because they were separated and friendly, had spiritual and ethical standards that were mutually enriching; freedom and discipline, individualism and collectivity, nature and nurture in their interaction promised an ever stronger democracy. I have no illusions that those simpler, happier days can be resurrected.”
—Agnes E. Meyer (1887–1970)
“When they turn the sun
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—Anne Sexton (1928–1974)
“Never assume one child is always the victim and the other the aggressor. Remember, no matter how things appear, it takes two to tango. If you look closely enough ... you will see how the victim subtly provokes the aggressor into attacking.”
—Ron Taffel (20th century)