Recent content by cuallito

Does something like an active diamagnet exist for when you need to block external magnetic fields, but a superconductor wouldn't be practical?

Are A and ϕ always zero inside a Faraday cage, like E and B are? If not, can its design be modified to accomplish that? If not, is there an analogous mechanism that'd always have A=0 and ϕ=0 inside?

Thanks, it's a good thing we have people like you on here. Is ##\phi## here the same thing as the electric potential, or is it any arbitrary scalar potential you can add to ## \vec A## ?

Can you please explain why?

I take your point, but wouldn't the potentials equaling one constant value in one gauge equal another constant value in another gauge?

Can the magnetic and electric potentials (A and φ) be fixed to zero, or at least some constant value in a region of space? Naively, I'd think something like this might work (a hollow conducting sphere connected to a voltage source connected to ground, would the potentials inside the sphere be...

A faraday cage made of a perfect conductor would theoretically have a zero E field inside. However, are there cases where a faraday cage made of a real conductor like copper wouldn't block out all EM radiation, like very high or low frequencies? How can the design be improved to make a real...

Obviously at point charges, but where along boundaries? Would they theoretically occur in superconductors since they can carry infinite current (J -> infinity)?

I've been thinking about electromagnetic shielding lately. Of course, you have your good, old-fashioned Faraday cage. But after staring at Maxwell's equations awhile, I'm thinking: We're after a static E field, right? So if we set ## \frac{\partial \textbf{E}}{\partial t}=0## in Ampere's...

Anyone know what honeycombs "tile" Minkowski space?

Hi, has anyone tried to build "quantum GR", using the expectation value of |Psi(x)> as a "quantum ruler" and |Psi(t)> as a "quantum clock" to build up the idea of a "quantum metric"?

Hi I'm trying to duplicate the experiment in the paper I've attached. I'm having some trouble sourcing the carbon loaded teflon described in the paper. Would something like graphite sheet work? I guess as long as you had something semi-conductive that heats so when EM radiation passes thru it...

I forgot to flip the sign for 2Cl(g)->Cl2(g), but I'm still not getting the right number:

Here's my attempt at solving it using Hess's Law. I get -1770kJ when I add up all the numbers. The correct answer is supposed to be -2484 kJ.

Anyone know what the simplest possible self-contained numeral system for complex numbers would be, analogous to signed ternary for integers? My guess would be quarter-imaginary base (https://en.wikipedia.org/wiki/Quater-imaginary_base.)