Determination of The Charge to Mass Ratio of an Electron
The discovery made by J.J. Thomson in 1897 was a step towards answering one of the most pondered problems of all time; what is the universe made of? Thomson successfully demonstrated that one thing all matter in the universe has, is what is now known as electrons. This was accomplished by measuring the charge to mass ratio of cathode rays, for many different typ es of cathodes; and the ratios were all the same! Here, the charge to mass ratio is determined in a slightly modified way compared to Thomson's method. Using an apparatus designed by W. Kaufman and later improved by Ralph P. Winch a value of 1.7588047(49) ± 0.0000028 x10 11 coulombs/ kilogram is obtained for the charge to mass ratio of an electron.
Published in 1997.