who measured the value of e/m ? thomson or millikan.

Asked by ayushikas | 22nd 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  | 22nd Jan, 2010, 04:43: PM

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