large/12904/worldswithinworlds_v1-3_1904_librivox_64kb_mp3/worldswithinworlds_01_asimov_64kb_239
large/12904/worldswithinworlds_v1-3_1904_librivox_64kb_mp3/worldswithinworlds_01_asimov_64kb
English
12904
By 1885, however, the English physicist William Crookes (1832 1919) showed that cathode rays could be made to turn a small wheel when they struck that wheel on one side. This seemed to show that the cathode rays possessed mass and were a stream of atom like particles, rather than a beam of mass less light. BY EIGHTEEN EIGHTY FIVE HOWEVER THE ENGLISH PHYSICIST WILLIAM CROOKS EIGHTEEN THIRTY TWO NINETEEN NINETEEN SHOWED THAT CATHODE RAYS COULD BE MADE TO TURN A SMALL WHEEL WHEN THEY STRUCK THAT WHEEL ON ONE SIDE THIS SEEMED TO SHOW THAT THE CATHODE RAYS POSSESSED MASS AND WERE A STREAM OF ATOM LIKE PARTICLES RATHER THAN A BEAM OF MASSLESS LIGHT
issler tube._ labelled: Current source] Such experiments were first performed by the German physicist Julius Plücker (1801-1868). In 1858 he noticed that when the current flowed across the vacuum there was a greenish glow about the wire that was attached to the cathode of the generator. Others studied this glow and finally the German physicist Eugen Goldstein (1850-1931) decided in 1876 that there were rays of some sort beginning at the wire attached to the negatively charged cathode and ending at the part of the tube opposite the cathode. He called them “cathode rays”. These cathode rays, it seemed, might well be the electric current itself, freed from the metal wires that usually carried it. If so, determining the nature of the cathode rays might reveal a great deal about the nature of the electric current. Were cathode rays something like light and were they made up of tiny waves? Or were they a stream of particles possessing mass? There were physicists on each side of the question. RST PERFORMED BY THE GERMAN PHYSICIST JULIUS PLUKER EIGHTEEN O ONE EIGHTEEN SIXTY EIGHT IN EIGHTEEN FIFTY EIGHT HE NOTICED THAT WHEN THE CURRENT FLOWED ACROSS THE VACUUM THERE WAS A GREENISH GLOW ABOUT THE WIRE THAT WAS ATTACHED TO THE CATHODE OF THE GENERATOR OTHERS STUDIED THIS GLOW AND FINALLY THE GERMAN PHYSICIST EUGENE GOLDSTEIN EIGHTEEN FIFTY NINETEEN THIRTY ONE DECIDED IN EIGHTEEN SEVENTY SIX THAT THERE WERE RAYS OF SOME SORT BEGINNING AT THE WIRE ATTACHED TO THE NEGATIVELY CHARGED CATHODE AND ENDING AT THE PART OF THE TUBE OPPOSITE THE CATHODE HE CALLED THEM CATHODE RAYS THESE CATHODE RAYS IT SEEMED MIGHT WELL BE THE ELECTRIC CURRENT ITSELF FREED FROM THE METAL WIRES THAT USUALLY CARRIED IT IF SO DETERMINING THE NATURE OF THE CATHODE RAYS MIGHT REVEAL A GREAT DEAL ABOUT THE NATURE OF THE ELECTRIC CURRENT WERE CATHODE RAYS SOMETHING LIKE LIGHT AND WERE THEY MADE UP OF TINY WAVES OR WERE THEY A STREAM OF PARTICLES POSSESSING MASS THERE WERE PHYSICISTS ON EACH SIDE OF THE QUESTION
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