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# Mass- Ratio of an Eletron

As J.J Thomson have determined the value of charge of electron to the mass of electron , I have some questions here

1) As determining the value of charge of electron to the mass of electron , what it yields to ?

2)What is it's importance

Note by Vinay Manjunath
3 years, 6 months ago

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When J.J. Thompson performed his cathode ray experiment, at that time of the history, there was no knowledge about either the charge or the mass of the electron. Thompson's pudding model of the atom had discussed negatively charged particles embedded in a positive sphere but the existence of such a particle was unknown. By performing this experiment, Thompson proved his theory by finding the charge-to-mass ratio which was the evidence of a particle.

Answering your next question, After Thompson's Cathode ray experiment, another scientist named Mullikan conducted another experiment known as the oil drop experiment, in which he deposited negative charge on levitating oil drops and calculated the charge on them. Later, with the help of Thompson's charge-to-mass ratio and Mullikan's charge value, other scientists were able to calculate the mass of an electron as well. CHEERS!!:)

- 3 years, 6 months ago