CBSE Class 9 Answered
who measured the value of e/m ? thomson or millikan.
Asked by ayushikas | 22 Jan, 2010, 03:52: PM
Expert Answer
In 1897, British physicist J.J. Thomson measured the ratio of electrical charge (e) to the mass of electron (me ) by using cathode ray tube and applying electrical and magnetic field perpendicular to each other as well as to the path of electrons.
R.A. Millikan (1868-1953) devised a method known as oil drop experiment (1906-14), to determine the charge on the electrons. He found that the charge on the electron to be – 1.6 × 10–19 C.
Answered by | 22 Jan, 2010, 04:43: PM
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