Variational Principle Video Lecture | CSIR NET Crash Course for Physical Science - CSIR NET Physical Science

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FAQs on Variational Principle Video Lecture - CSIR NET Crash Course for Physical Science - CSIR NET Physical Science

1. What is the variational principle in the context of physical science?
Ans. The variational principle in physical science states that the true solution to a physical problem minimizes or maximizes a certain functional, known as the action, which represents the physical quantity of interest.
2. How is the variational principle used in physics to find the equations of motion?
Ans. In physics, the variational principle is used to derive the equations of motion for a system by considering all possible paths that the system could take and then determining which path minimizes or maximizes the action integral.
3. Can the variational principle be applied to quantum mechanics?
Ans. Yes, the variational principle can be applied to quantum mechanics to find approximate solutions to the Schrödinger equation for complex systems where an exact solution is not feasible.
4. What is the significance of the variational principle in computational physics?
Ans. In computational physics, the variational principle is used to develop numerical methods for solving complex physical problems by approximating the true solution through trial functions that minimize the action.
5. How does the variational principle relate to the principle of least action in classical mechanics?
Ans. The variational principle is closely related to the principle of least action in classical mechanics, where both principles state that the true path taken by a system is the one that minimizes the action integral, representing the total energy of the system.
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