Description:
Fundamental and philosophical physics. (Moderated)
|
|
|
Necessity of least action principle
|
| |
I've developed the Feynman Path Integral from first principles, apart from physical requirements. And I'm trying to make contact with physics. It would help if there were a requirement that the variation of the action be zero. Then Euler-Lagrange equations of motion would procede from that. So does the evaluation of the path integral require... more »
|
|
|
What Happens to Fourier Transforms in Curved Spacetime?
|
| |
In flat spacetime, one may take the forward Fourier transform, for example, of a vector J^u, according to: J^u(k) = $ d^4x J^u(x) exp[-i p_s x^s] (1) Does this change at all in curved spacetime? In particular, is it necessary to generalize the Fourier Kernel exp[-i p_s x^s], to something else, for example:... more »
|
|
|
Does SR originate from basic medium behavior?
|
| |
Given that in any medium the propagation speed is a physical characteristic of its foundational kinetic entities. It should therefore be obvious that this must result in something called the “law of equal paths”. This means that any propagating disturbance will travel an equal distance (path) in an equal amount of time.... more »
|
|
|
A Macro-Mechanical Force From the Quantum Vacuum
|
| |
Re: A Macro-Mechanical Force From the Quantum Vacuum Esteemed Colleagues! I am having great difficulty locating researchers who both believe that the ZPE is actually real and also have knowledge of solid state optics in the low nm range of the EUV Spectrum. This concerns my proposal for a device that... more »
|
|
|
What is the Gravitationally-Covariant derivative of the coordinates x^u?
|
| |
I would like to discuss how one establishes the gravitationally-covariant derivative of the coordinates x^u. The context for the question I am raising here, arises from a comment made by Mark Hopkins in a separate thread on sci.physics.research (Integration by Parts of the Maxwell QED Action, Tuesday, October 06,... more »
|
|
|
Deterministic physics
|
| |
I've just finished paper in which I try to convince that quantum mechanics does not have to lead to indeterminism, but is just a natural consequence of four-dimensional nature of our world - that for example particles shouldn't be imagined as 'moving points' in space, but as their trajectories in the spacetime like in optimizing action... more »
|
|
|
Simple? fundamental question about EM in cavity
|
| |
If an atom emits EM radiation in an optic fiber (cavity) of lenght L and L isn't equal to n. lambda/2 will this atom radiate or not? A) If yes (radiates): There will not be a standing wave in the fiber as it is contrary stated in any textbook B) If no: The atom must learn the value of L at every instant of time... more »
|
|
|
Another question on Dirac's GR book
|
| |
I'm stuck again on a statement Dirac makes in chapter 26 of his GR book, on the gravitational action principle (p. 48). He has the integral I = {int} R sqrt(-g) d{sup 4}x, where R is the scalar curvature (the contraction of the Ricci tensor), g is the determinant of the metric, and d{sup 4}x = dx{sup 0} dx{sup 1} dx{sup 2} dx{sup 3},... more »
|
|
|
|
