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Einführung in die, Elektronik: die Experimental-physik des freien Electrons im Lichte der klassischen Theorie und der Wellenmechanik

Nature volume 135, page 249 (16 February 1935) | Download Citation



PHYSICISTS have long felt the need of a A book on electronic phenomena, in which experimental methods and results are collected together in a convenient form for reference. Dr. Klemperer has collected and sifted his material with great care and discrimination. As a handbook for workers with electrons, his book will be an invaluable help. A great number of useful tables and graphs are scattered throughout the work. On p. 12 we have a list of the formulæ, relationships and numerical values of the velocity and energy expressions for the electron; this is followed by a table, constructed from one given earlier by M. G. Fournier, containing numerical data for electrons of all velocities, and the curvature of their paths in different uniform magnetic fields. From the last value given we see that if an electron moves very little less slowly than light, namely in the ratio 0.99999999870 to 1 (corresponding to a volt-velocity of 1010), the mass increases to 19,585 its rest value.

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