Word: electronic
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Dates: during 1950-1959
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...Motz's "millimeter-wave generator" is made up, first, of a linear accelerator that produces a pulsed beam of electrons about ? inch in diameter. The electrons, whose energy is 2,000,000 electron volts, pass into an "undulator," a silver wave guide that is held between 16 pointed steel teeth. The teeth set up separate and alternating magnetic fields, and as the electrons pass from field to field, they are made to oscillate, forming the desired waves less than one millimeter long...
Visible Radio. Dr. Motz can make them even smaller by increasing the speed of the electrons and therefore increasing the Lorentz contraction. Once he hitched his undulator to a large linear accelerator that sent out electrons at 100 million electron volts. From the business end came a beam of blue light. He had actually generated "radio waves" that were short enough to qualify as visible light. This stunt proved that the stubborn gap in the spectrum has been closed, but it is hardly practical. There are better ways of generating the waves of light and heat...
...microscope, the X rays are generated by an electron beam that is focused by electronic lenses on a spot only one-100,000th of an inch in diameter, 300 times smaller than the diameter of a human hair. X rays coming from this tiny pinpoint cast shadows so sharp that they keep their definition even when thrown on a fluorescent screen or photographic film with 1,500 diameters of magnification...
...peculiar track was made by enormously powerful gamma rays that created electron-positron pairs as they streaked away from the site of the collision...
...primary cosmic rays that bombard the top of the atmosphere. Later, studying the plates in the laboratory, Dr. Schein got more and more excited as he followed a peculiar ray track through the pack. The track was a bundle of slim Vs made by pairs of negative and positive electrons and there was no trace of larger charged particles (e.g., protons) usually present. His cautious conclusion: "something" had hit the film pack with the unheard-of energy of 10 million billion electron-volts...