Word: electronic
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Dates: during 1930-1939
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...conflict. Relativity dispenses with the idea of absolute time; quantum mechanics retains it. Although it is a tremendously powerful approach to atomic behavior, quantum mechanics is shot through with uncertainty. It has given birth to the Uncertainty Principle of Heisenberg, which states that the position and velocity of an electron cannot be simultaneously ascertained. In the Schrödinger wave mechanics, the little symbol ψ is important. It stands, roughly, for statistical probability. Instead of locating the electron, it locates a region in which the electron probably occurs...
...Zworykin sender the image to be televised falls on a small sheet of mica covered with millions of microscopic dots of photosensitive cesium. Each tiny dot receives an electric charge according to the amount of light that falls on it. A beam of electrons shot from a cathode tube and controlled by rapidly oscillating magnetic fields weaves back & forth across the sheet of mica 6,000 times per second. The beam discharges the electropositive tension in the dots, and the changing pattern of this discharge modulates a current passing through the sheet. The modulated current, fed into a radio transmitter...
...radiation seven times stronger than at the earth's surface. Thus the rays were seen to be coming in from the cosmos beyond Earth's blanket of air. Calculation revealed them as more penetrating than the gamma rays which emerge from radium at 3,000,000 electron-volts. Stopped by the War, the cosmic ray hunt started with fresh impetus after Peace. In the U. S., brilliant, imaginative Robert Andrews Millikan of California Institute of Technology, who had won the Nobel Prize for isolating and measuring the electron, sank his recorders under 280 ft. of water in California...
...more drops in front than in back. This small daily variation in the cosmic rays has actually been observed, so Dr. Compton agrees they must come from the remotest depths of space. What is their scientific importance? 1) A cosmic ray impact led to the discovery of the positive electron, a fundamental particle of matter. 2) The geographic distribution of the rays facilitates study of Earth's magnetic field. 3) For laboratory work cosmic rays provide atomic bullets thousands of times more powerful than any produced by man. 4) Their behavior at high voltages has already indicated a deficiency...
When a physicist has determined the electric charge of one electron, he has determined the charge of all electrons. If the minds of men were like electrons, the tasks of psychologists would be easier. As it is, psychologists rarely bother with the vagaries of a single individual but test, question, examine hundreds-thousands if possible. Some conclusions distilled from such surveys and presented at last week's gathering of 500 psychologists in Ann Arbor, Mich...