What is the physical meaning of the action in Lagrangian mechanics?
The Hamiltonian H and Lagrangian L which are rather abstract constructions in classical mechanics get a very simple interpretation in relativistic quantum mechanics. Both are …
Why the Principle of Least Action? - Physics Stack Exchange
And the Lagrangian is the answer to that, although it's not a 100% satisfactory one because the path that is taken need not strictly speaking be the truly least action path. We integrate it, it …
What is the difference between Newtonian and Lagrangian …
Lagrangian formulation is what you obtain when you consider systems that are defined on "curved spaces" (in a sense that I won't make precise, but think e.g. about pendulum constrained to a …
Physical meaning of the Lagrangian function [duplicate]
The point was, I wanted to have a physical interpretation of the Lagrangian, and leave the action and the principle as abstract constructions done for who knows what reason, probably …
Deriving Lagrangian density for electromagnetic field
A professor, named Bahman Zohuri, of the Department of Electrical and Computer Engineering, University of New Mexico published at 30 January 2019 a paper in pdf format titled "Deriving …
Derivation of Maxwell's equations using Lagrangian formalism
Mar 4, 2024 · The use of the Lagrangian formalism is not restricted to (point) mechanics, but all fundamental interactions (electroweak, strong, gravitation) are defined by the action integral of …
The origin of the Lagrangian - Physics Stack Exchange
Oct 12, 2020 · Is it possible to explain the form of Lagrangian L = T − V L = T V and action principle in the following way? The force that acts on a mass particle is due to the potential …
Momentum in Lagrangian mechanics - Physics Stack Exchange
Apr 11, 2021 · Calling ∂L ∂q˙ ∂ L ∂ q plainly "momentum" is a little awkward, especially for people first learning about Lagrangian mechanics. More accurately it is called "generalized …
How does the Lagrangian work with a magnetic field?
Sep 22, 2023 · As was said in the commentary by @knzhou, what you have written is the Lagrangian for a particle with magnetic moment and no charge (e.g. like neutron). Then your …
On Landaus&Lifshitz's derivation of the lagrangian of a free …
May 19, 2024 · I understand this sentence in the following way. We want the (coordinate representative) of the Lagrangian with respect to the primed coordinates to be equal to the …