Word: emits
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Dates: during 1960-1969
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Like the creak of wheels on a horse-drawn cart or the dry wheeze of a hand-cranked auto engine, the familiar ring-a-ling of the telephone will soon be only an echo of the past. The telephone of the future will emit four staccato baritone beeps-and this week, in the homes of 300 residents of Morris, Ill., a farming center 75 miles southwest of Chicago, the beep of tomorrow could already be heard. Using Morris as a pilot project, Bell Telephone Laboratories have installed telephones that...
...about 4 trillion particles enter the bulb in one second, the agitated gas gets dense enough to support a sort of chain reaction. A few atoms spontaneously lose their extra energy, which they emit in the form of photons (units) of radio microwaves about 21 cm. (8.3 in.) long. The newborn photons hit other hydrogen atoms and make them emit photons too. Then a pulse of microwaves bursts from the bulb and is gathered as high-frequency current by apparatus outside...
Then a sort of chain reaction happens. A few atoms drop spontaneously to the lowest energy level, emitting photons (units) of deep red light. The photons hit other chromium atoms, knocking them off their energy shelf and making them emit more photons of red light. The photons that move sideways escape from the rod, but a few of them hit its polished ends, which the scientists have covered with a thin film of silver that reflects nearly all of them back into the rod. This reflected light moves lengthwise between the two end mirrors, traversing .all of the ruby...
...oxygen refresh the air, and there is also an electrolytic cell that turns sea water into oxygen and hydrogen, shooting the latter out of the submarine. For emergencies, the Naval Research Laboratory has provided ingenious "candles" made of sodium chlorate and powdered iron. When they are ignited, they emit oxygen, not the carbon dioxide that is given off by ordinary candles...
...play for the smaller catch, the Club's secretary, Peter J. Enderlin '61 is investigating an electronic method in which fish are attracted by electrical impulse. Discovered by a German scientist named Kreutzer, to whom Enderlin has written for advice, the system utilizes the finding that fish emit and are attracted by characteristic signals, similar to bird calls. The Club hopes to land tuna by this method...