Question
The e/m ratio for electron was determined by:
The correct answer is
J.J. Thomson
J.J. Thomson and the Electron e/m Ratio
The determination of the charge-to-mass ratio (e/m) for the electron is a fundamental discovery in atomic physics.
J.J. Thomson is the scientist credited with measuring this ratio in 1897.
Key Findings
- J.J. Thomson conducted experiments using cathode ray tubes.
- He measured the deflection of cathode rays in electric and magnetic fields.
- By analyzing these deflections, he calculated the ratio of the electron's charge (e) to its mass (m).
- This measurement was crucial evidence for the electron being a fundamental particle and provided its charge-to-mass ratio, e/m = 1.7588 × 1011 C/kg.
Conclusion
Therefore, J.J. Thomson determined the e/m ratio for the electron.
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Important Questions from Structure of Atom
α particles are doubly charged ions of ________.
Which non-metal among the following is poly-atomic?
The elements belonging to the same group of periodic table have the same-
The sum of the total number of protons and neutrons present in the nucleus of an atom is known as-
A chemical equation is said to be balanced if number of ________.
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