Word: electronic
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Dates: during 1940-1949
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Every time an honored theory is disproved or amended, science makes a little progress. For 20 years the Dirac theory of electron behavior has been the bible of wave (quantum) mechanics.* Last week Columbia University announced that two of its young scientists, Professor Willis Lamb, 34, and Robert Retherford, 35, had knocked a prop from under the Dirac theory. Their experiment, said Columbia's Nobel Physicist Isidor Isaac Rabi, revealed new facts which will be of "inestimable value in future research...
...Bureau mounts its diamonds (which must be more colorless and flawless than good grade jewelry stones) between two small brass contacts. One contact is charged with 1,000 volts of electricity. When an alpha, beta or gamma ray hits the diamond, it knocks an electron off one of the carbon atoms of which the diamond is composed. Propelled by the pressure of the 1,000 volts, the electron darts along one of the straight channels which run between the atoms of a diamond crystal. This motion sets up an electrical pulsation that can be detected easily by various standard instruments...
Successful Wallop. This feat was accomplished by Cal's fantastic new 184-inch cyclotron, which packs the most powerful wallop ever achieved by man. Firing relatively heavy atomic bullets-deuterons (heavy hydrogen nuclei) and alpha particles (helium nuclei)-with a force of 200 million to 400 million electron volts, the cyclotron has almost ten times the power of the most potent cyclotron previously known (also at Cal).* At an American Physical Society meeting at Stanford last week, Physicists Glenn T. Seaborg and Isadore Perlman made the first report on what they and their California teammates, who work under...
Viruses are the cause of some of mankind's most deadly epidemic diseases-e.g., influenza, yellow fever, smallpox, infantile paralysis. But until a few years ago, nobody had ever seen a virus. Now, thanks to the electron microscope which makes them visible, biologists are able to study the viruses' submicroscopic world...
Viruses are the smallest known disease-producing organisms: the biggest of them is less than one-hundred-thousandth of an inch in diameter. Biologists once wondered whether a virus was a living organism or just an overgrown, active protein molecule. The dispute is still not entirely settled, but the electron microscope shows that many of them look and act like living things. At a recent American Medical Association symposium, leading U.S. virologists described an amazing variety of viruses, ranging from types that attack only bacteria to those that infect...