Word: quanta
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Dates: during 1990-1999
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...young technical officer in a Swiss patent office in 1905, he produced three papers that changed science forever. The first, for which he was later to win the Nobel Prize, described how light could behave not only like a wave but also like a stream of particles, called quanta or photons. This wave-particle duality became the foundation of what is known as quantum physics. It also provided theoretical underpinnings for such 20th century advances as television, lasers and semiconductors...
...great conceptual revolution of the early 20th century. The first step toward quantum theory came in 1900, when Max Planck, working in Berlin, discovered that the radiation from a body that was glowing red hot could be explained if light came only in packets of a certain size, called quanta. It was as if radiation were packaged like sugar; you cannot buy an arbitrary amount of loose sugar in a supermarket but can only buy it in 1-lb. bags. In one of his groundbreaking papers written in 1905, when he was still at the patent office, Einstein showed that...
...other physicists, Einstein was convinced that in the conflict between quantum mechanics and general relativity, it was the former that constituted the crux of the problem. "I must seem like an ostrich who forever buries its head in the relativistic sand in order not to face the evil quanta," Einstein reflected...
...young executive named Charles Schwab to buy out Andrew Carnegie and conglomerate U.S. Steel, by far the biggest business in the world. And the German physicist Max Planck made one of the discoveries that would shape the century: that atoms emit radiations of energy in bursts he called quanta...