Who evaluated the mass of electron indirectly with help of charge:
- Thomson
- Millikan
- Rutherford
- Newton
The Correct Option is B
Solution and Explanation
Robert A. Millikan performed the famous oil drop experiment in 1909, which allowed him to determine the charge of the electron. By knowing the charge-to-mass ratio of the electron and the charge (which he determined), he could indirectly calculate the mass of the electron. This experiment played a crucial role in accurately determining the fundamental properties of the electron.
So, the correct option is (B): Millikan
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Concepts Used:
Dual Nature of Radiation and Matter
The dual nature of matter and the dual nature of radiation were throughgoing concepts of physics. At the beginning of the 20th century, scientists untangled one of the best-kept secrets of nature – the wave-particle duplexity or the dual nature of matter and radiation.
Electronic Emission
The least energy that is needed to emit an electron from the surface of a metal can be supplied to the loose electrons.
Photoelectric Effect
The photoelectric effect is a phenomenon that involves electrons getting away from the surface of materials.
Heisenberg’s Uncertainty Principle
Heisenberg’s Uncertainty Principle states that both the momentum and position of a particle cannot be determined simultaneously.