This question is subtle and those who may answer it are prone to fall into "frame of mind" traps that I'm specifically trying to avoid here; particularly the "discrete vs....

Dear Friends, Linked below is a three page exercise showing how the pure, linear Maxwell field is integrated by parts in...

If I wanted to write the wave equation for a frame of reference where a source is moving with respect to me would it be Del'^2E - (1/c^2)(d^2E/dt^2) - (d^2E/dx'^2) = 0 ...

Hi. This is from a mathematician struggling to achieve some kind of mental grasp of quantum field theory. :-) I'd like to know if there exists a presentation of the Fock...

"Juan R." Gonz=E1lez-=C1lvarez in litteris scripsit: David Madore wrote on Mon, 14 Sep 2009 22:21:25 +0000: (I find...

Can anyone point me to a textbook with a good description of lock in amplifiers, including the mathematics and perhaps some intuition. I have Horowitz and Hill here but it...

For simplicity let us take a one dimensional space with a particle in it described by the standard Hamiltonian H=p^2/2m. The state space for such a system is generally taken...

Hi, We did not cover magnetism in depth in my Year 12 Physics syllabus, particularly what happens beyond saturation. Googling around didn't turn up much but perhaps I am...

For non reversible computing the energy cost of throwing a away a bit is (IIRC) kTln(2) Given something like a double precision floating point calculation, what is the...

] Combining NASA/JPL One-Way Optical-Fiber Light-Speed Data with Spacecraft Earth-Flyby Doppler-Shift Data to Characterise 3-Space Flow Reginald T Cahill (Flinders...

The new, twenty-third edition of the freely downloadable physics textbook is available on http://www.motionmountain.net Over 1500 pages in five volumes show that...

Hello- I am contacting you to make you aware of NineSigma Request, RFP# 65352, "High Temperature Insulating Materials for Protecting Electronic Device." Our client, a...

David Madore wrote: That's something else I've always had problems with: what does it mean exactly, that there "are no" interacting field equations? That the equations...

David Madore schrieb: So again: usual descriptions of Fock space are not manifestly Lorentz-invariant in that they give the t coordinate a different role from x,y,z,...

I seem to recall having this discussion before, but need to refresh. When apply we the canonical : = ih delta^i_j, i=1,2,3 (1) is this really just an approximate...

Many physicists are not comfortable with the non-local implications of Bell's Theorem Experiments. I have presented talks on Relativity and Space-time. Non-local behavior...

Hi, R = R ( t ) = the cosmic expansion factor, function of the cosmic time t. Observations show accelerated expansion. What is the most probable form of R at present...

On Thu, 10 Sep 2009 16:38:01 +0000 (UTC), harry wrote: On Sep 9, 11:09=A0am, Jim Black ...

In some sense I feel this question is naive, but I'd like to know how one deals with a Lorenzian Cylinder Spacetime in both the classical and quantum setting. Here's what I...

Dear All, regarding Bell's discussion of EPR-style experiments , I have a question that I hope you may be able to anwer. I haven't seen the question mentioned or answered in...