Search Details

Word: electronically (lookup in dictionary) (lookup stats)
Dates: all
Sort By: most recent first (reverse)


Usage:

...prizes that has dangled just out of reach of the scientists is a method of amplifying light: i.e., increasing the brilliance of a dim "picture." It can be done in the innards of electron tubes, but only in ways that are unsatisfactory. The ideal is a system that will brighten an optical image-with all its lights and shadows-just as sound is strengthened by a public-address apparatus...

Author: /time Magazine | Title: Science: Stepped-Up | 12/27/1954 | See Source »

Biologists are sure that some influence analogous to executive orders, moves from the nucleus to the obedient cytoplasm but the nature of the influence is a mystery. Last week at a Manhattan meeting of the National Academy of Sciences Professor Arthur W. Pollister of Columbia University showed electron microscope pictures of a frog's egg cell. Magnified 24,000 diameters, the membrane of the nucleus looks solid, but poking through it are rod-shaped objects. Dr. Pollister suspects that they are chemical memos ordering the egg to develop into a tadpole rather than into a mouse or a whale...

Author: /time Magazine | Title: Science: Directors' Orders | 11/22/1954 | See Source »

...cyclotron which requires two buildings to house it appears as a complex body of magnets, vacuum tubes, and wires. It is used to supply radio-activity for experiments, and is powerful enough to generate a hundred million electron volts...

Author: By Bruce M. Reeves, | Title: 3-Week Vigil Set to Avoid Cyclotron Halt | 11/13/1954 | See Source »

...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...

Author: /time Magazine | Title: Science: Millimeter Waves | 9/20/1954 | See Source »

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...

Author: /time Magazine | Title: Science: Millimeter Waves | 9/20/1954 | See Source »

Previous | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | Next