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Dates: during 1990-1999
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Einstein continued to work on the quantum idea into the 1920s but was deeply disturbed by the work of Werner Heisenberg in Copenhagen, Paul Dirac in Cambridge and Erwin Schrodinger in Zurich, who developed a new picture of reality called quantum mechanics. No longer did tiny particles have a definite position and speed. On the contrary, the more accurately you determined the particle's position, the less accurately you could determine its speed, and vice versa...

Author: /time Magazine | Title: A Brief History of Relativity | 12/31/1999 | See Source »

Einstein was horrified by this random, unpredictable element in the basic laws and never fully accepted quantum mechanics. His feelings were expressed in his famous God-does-not-play-dice dictum. Most other scientists, however, accepted the validity of the new quantum laws because they showed excellent agreement with observations and because they seemed to explain a whole range of previously unaccounted-for phenomena. They are the basis of modern developments in chemistry, molecular biology and electronics and the foundation of the technology that has transformed the world in the past half-century...

Author: /time Magazine | Title: A Brief History of Relativity | 12/31/1999 | See Source »

After World War II, he urged the Allies to set up a world government to control the atom bomb. He was offered the presidency of the new state of Israel in 1952 but turned it down. "Politics is for the moment," he once wrote, "while...an equation is for eternity." The equations of general relativity are his best epitaph and memorial. They should last as long as the universe...

Author: /time Magazine | Title: A Brief History of Relativity | 12/31/1999 | See Source »

...cosmic crapshoot, so that today his papers on unified field theory seem hopelessly archaic. But the puzzle they tried to solve is utterly fundamental. In simply recognizing the problem, Einstein was so daringly far-sighted that only now has the rest of physics begun to catch up. A new generation of physicists has at last taken on the challenge of creating a complete theory--one capable of explaining, in Einstein's words, "every element of the physical reality." And judging from the progress they have made, the next century could usher in an intellectual revolution even more exciting than...

Author: /time Magazine | Title: Unfinished Symphony | 12/31/1999 | See Source »

...exacting a price, and the price, in this case, takes the form of additional complications. Among other things, string theory requires the existence of up to seven dimensions in addition to the by now familiar four (height, width, length and time). It also requires the existence of an entirely new class of subatomic particles, known as supersymmetric particles, or "sparticles." Moreover, there isn't just one string theory but five. Although scientists could rule out none of them, it seemed impossible that all of them could be right...

Author: /time Magazine | Title: Unfinished Symphony | 12/31/1999 | See Source »

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