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Dec
27
comment How to prove the equivalence of two definitions of the scattering cross section
It's my fault, I forgot to mention differential. I'll edit it now.
Dec
27
comment How to prove the equivalence of two definitions of the scattering cross section
As much as I know both are called differential cross sections.
Nov
17
comment Are the Maxwell's equations enough to derive the law of Coulomb?
@Daniel Blay: I guess when you say usual tricks you mean taking a spherical surface around the point charge. The problem for me is that how do we know that the magnitude of the electric field from a point charge is spherically-symmetric. Besides how can we derive that there is no magnetic field (if it is possible to derive from Maxwell's equations)? :)
Nov
17
comment Are the Maxwell's equations enough to derive the law of Coulomb?
@DanilH: I meant 8 scalar equations. From the 4 Maxwell's equations two are vector equations.
Nov
17
comment Are the Maxwell's equations enough to derive the law of Coulomb?
Yes, I have already read this post, but my question is quite different.
Sep
22
comment Deriving the action and the Lagrangian for a free point particle in Special Relativity
Thanks for the answer and for the correct spelling of Lorentz.
May
5
comment The number of independent variables in the Lagrangian and Hamiltonian methods in Classical Mechanics
@Qmechanic : Could you please give the explanation of the Hamiltonian action. Why does it depend on momentum path?
Apr
6
comment The form of Lagrangian for a free particle
OK, now I really understood what was the problem! Thank you very much!