Word: electronic
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Dates: during 1930-1939
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...place. Cosmic rays are electrified particles which constantly bombard Earth from every direction. It is estimated that about 30 shoot through every human body every second. They have energies higher than any particles ever propelled by man-made machines- energies, in some cases, measured in hundreds of billions of electron-volts...
...physicist appear to be about the same as those of a championship tennis player. Most of the five bigwigs of Quantum Mechanics did their most important work when they were very young men. Heisenberg, for example, laid down his celebrated Uncertainty Principle (relating to the position and velocity of electrons) when he was 26; Dirac mathematically deduced the existence of the positive electron when he was 28. Once a theorist has constructed a powerful new theory, he is likely to become fond of it and spend much energy polishing and protecting it. To more than one scientist who contemplated last...
...modern physics, beams of light are considered as particles as well as waves, and beams of electrons are considered as waves as well as particles. A microscope using visible illumination is limited in magnifying power by the wave length of light. Particles considerably smaller than the wave length escape detection because they slip through the meshes of the light waves like BB shot through a tennis net. But electrons have wave lengths 100,000 times smaller than those of light, and electrons, although they cannot be focused by a lens, can be focused by electric or magnetic fields which...
...German electronic microscope described last week, electron beams are straightened out in a magnetic coil, passed through the specimen to be studied, focused in another coil. The voltage used is 80,000. The resolving power (magnification) is 25 times greater than in visual microscopes, whereas a tenfold increase for electronic magnification had previously been considered tops...
...Prime example of the dogmatic spirit is "the relativistic theories of Einstein, which are based on an arbitrary definition of space and time coordinates. . . ." Other examples are theories of wave mechanics in which the electron is "arbitrarily smeared in a large spatial region around the atom" or made to "dance round the atom in an irregular manner...