Weegy: In the year 1894 John Thomson carried out the research on cathode rays. He tried to estimated their velocity, which could say much about their structure. [ He decided to undertake this study was caused by the discovery that cathode rays could be abberate by magnetic field. If they were electromagnetic waves their aberration could be explained by granular, connected with the magnetic field structure of ether in which the waves could move. But Thomson didn't like that idea. He wanted to prove that, although these rays could stimulate glass's luminosity, they were not a kind of ultraviolet radiation as some other scientists suggested.
]
(More) 
