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Lecture 10: Free Particle Quantum Mechanics Video Lecture | Quantum Mechanics for GATE - GATE Physics

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FAQs on Lecture 10: Free Particle Quantum Mechanics Video Lecture - Quantum Mechanics for GATE - GATE Physics

1. What is a free particle in quantum mechanics?
Ans. In quantum mechanics, a free particle is a particle that is not subjected to any external forces or potentials. This means that the particle's energy is determined solely by its momentum.
2. How is the wave function of a free particle described in quantum mechanics?
Ans. The wave function of a free particle in quantum mechanics is described by a plane wave. This plane wave represents the probability amplitude of finding the particle at a certain position in space.
3. How does the energy of a free particle in quantum mechanics relate to its momentum?
Ans. In quantum mechanics, the energy of a free particle is related to its momentum through the de Broglie relation, which states that the wavelength of a particle is inversely proportional to its momentum. This relationship is given by the equation E = (p^2)/(2m), where E is the energy, p is the momentum, and m is the mass of the particle.
4. What is the uncertainty principle in quantum mechanics and how does it apply to free particles?
Ans. The uncertainty principle in quantum mechanics states that there is a fundamental limit to the precision with which certain pairs of properties of a particle, such as position and momentum, can be known simultaneously. For free particles, this means that the more accurately we know the momentum of a particle, the less precisely we can know its position, and vice versa.
5. How does the concept of wave-particle duality apply to free particles in quantum mechanics?
Ans. The concept of wave-particle duality in quantum mechanics states that particles, such as electrons, can exhibit both wave-like and particle-like behavior. For free particles, this means that they can be described by both wave functions, which represent their probability amplitudes, and classical particles with well-defined positions and momenta.
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