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2010ref. DADAX1161107630Kessinger Publishing 2010-04-18. paperback. New. 6.00x1.12x9.00. Buy with confidence. Excellent Customer Service & Return policy. Kessinger Publishing paperback
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1897ref. 618161897. Ann. Phys. 3. Folge 61. - Leipzig Verlag von Johann Ambrosius Barth 1897 8° VIII 805 3 pp. nebst 10 Figurentafeln Pappband. d.Zt. THE BIRTH OF PARTICLE PHYSICS. First printing of this landmark paper in particle physics in which Kaufmann found that the cathode are negatively charged particles that certain properties of the cathode rays are independent of the nature of the gas that they traverse and determining the ratio e/m. charge/mass "To define the 'birth of an era' is perhaps best left for parlor games. Let me write of the BIRTH OF PARTICLE PHYSICS nevertheless define it to take place in April 1897 and appoint Kaufmann and Thomson as keepers of the gate. Their respective experimental arrangements.are of comparable quality their experimental results equally good."Pais Inward Bound p. 84. "In 1897 three physicists Weichert Kaufmann and Thomson in independent experiments found that cathode rays are indeed negatively charged particles having the peculiar property that the ratio of the mass and the charge of these particles is in the order of 1000 times smaller than for the lightest ion the ion of the hydrogen. The term 'electron' which had previously been used to denote the 'elementary charge' was soon adopted as the name of the new particle. The electron was the first of the later so-called 'elementary particles' to be discovered." Siegmund Brandt The Harvest of a Century" No. 4 p.16 ff. Walter Kaufmann 1871-1947 physicist is best known for the first experimental proof of the velocity dependence of mass which was an important contribution to the development of modern physics including special relativity. unknown
