Word: electronics
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Dates: during 1940-1949
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...social sciences plane, the exhibit features the first edition of Nietzche's "Geneologie de Moral," the first written presentation of Einstein's Corpuscular Theory of Light, and the first edition of Millikan's "The Electron...
...Dirac is the genius who sensed the existence of the positron (positive electron) by figuring how a "hole" would behave if one should appear in a field of (negative) electrons. The hole, he decided, would act like a positive electron. Though no such particle had ever been found, colleagues began to look. Sure enough, they found the holes, as tangible as anything in basic physics, and named them "positrons...
...Princeton, 15 years later, Dr. Dirac, who had forecast a particle, theorized about what happens when one particle strikes another. He selected the two simplest: the electron and the photon (unit of electromagnetic radiation, such as light). To explain how they interact, he ploughed through relativistic bafflements, covered a blackboard with lacy mathematics. Many listeners looked as if they had been hit on the head. Dirac himself seemed unsure...
...Danish accent, Bohr spoke last week on "The Observation Problem in Atomic Physics." It is, it seems, a tough one for the meticulous physicist. If you know where an electron is, you cannot measure its velocity; if you know its velocity, you cannot know where it is. There is also the difficulty of stopping time in its tracks while making an observation. It should be done, but it's impossible...
...Meson. Last week 500 ultra-physicists gathered in Manhattan at a meeting of the American Physical Society to discuss this unfinished business. The meson (pronounced mees-on) was the star of the convention. Most physicists agreed that this subatomic particle, which weighs 200 times as much as an electron, was the key to the problem...