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
Top Questions on Dual nature of radiation and matter
- Two spherical black bodies radiate the same amount of heat per second. If their temperatures are \( T_1 \) and \( T_2 \), and their radii are \( R_1 \) and \( R_2 \), respectively, find the relation between their temperatures and radii.
- MHT CET - 2025
- Physics
- Dual nature of radiation and matter
- Atomic spectral emission lines of hydrogen atom are incident on a zinc surface. The lines which can emit photoelectrons from the surface are members of:
- CBSE CLASS XII - 2025
- Physics
- Dual nature of radiation and matter
- Radiations of two frequencies are incident on a metal surface of work function 2.0 eV one by one. The energies of their photons are 2.5 eV and 4.5 eV respectively. Find the ratio of the maximum speed of the electrons emitted in the two cases.
- CBSE CLASS XII - 2025
- Physics
- Dual nature of radiation and matter
- Whether the total mass of nuclei increases, decreases or remains unchanged?
- CBSE CLASS XII - 2025
- Physics
- Dual nature of radiation and matter
- Does the process require energy or produce energy?
- CBSE CLASS XII - 2025
- Physics
- Dual nature of radiation and matter
Questions Asked in NEET exam
The output (Y) of the given logic gate is similar to the output of an/a :
- NEET (UG) - 2024
- Digital Electronics and Logic Gates
- Interference pattern can be observed due to superposition of the following waves:
A. \(y = a \sin \omega t\) B. \(y = a \sin 2\omega t\)
C. \(y = a \sin(\omega t - \phi)\) D. \(y = a \sin 3\omega t\)
Choose the correct answer from the options given below.- NEET (UG) - 2024
- Wave optics
- The capacitance of a capacitor with charge q and a potential difference V depends on :
- NEET (UG) - 2024
- Capacitors and Capacitance
- A step up transformer is connected to an ac mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer, is
- NEET (UG) - 2024
- Electromagnetic induction
- In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is 100x (kcal m-2)yr-1, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
- NEET (UG) - 2024
- Ecosystems
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.