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Nov
23
reviewed Approve suggested edit on Ames Room, how to construct properly?
Nov
23
reviewed Approve suggested edit on Can causality be violated?
Nov
22
reviewed Approve suggested edit on What if the centripetal force were acting outward?
Nov
21
reviewed Reject suggested edit on Problem in deducing the equations of motion using indefinite integral
Nov
10
reviewed Approve suggested edit on The correspondence between real space and reciprocal space
Nov
7
comment Deriving Heaviside-Feynman formula for the electric field of an arbitrarily moving charge from Lienard-Wiechert potential
@guillefix, ok I see. I should have read more closely before piping up. Nice approach! (But how can you not trust something by someone named Field?)
Nov
7
revised Deriving Heaviside-Feynman formula for the electric field of an arbitrarily moving charge from Lienard-Wiechert potential
typo
Nov
7
answered Deriving Heaviside-Feynman formula for the electric field of an arbitrarily moving charge from Lienard-Wiechert potential
Nov
7
reviewed Approve suggested edit on Refraction of light beam water to air
Nov
7
comment Feynman's proof for Liénard-Wiechert's potential of a moving charge
@guillefix, think I got it. Thanks again for the catch.
Nov
7
revised Feynman's proof for Liénard-Wiechert's potential of a moving charge
minding my c's
Nov
6
comment Feynman's proof for Liénard-Wiechert's potential of a moving charge
@guillefix, thanks! I see now I got sloppy with $c$ in a couple places. (I understand better now why people set $c=1$!) I will patch it today or tomorrow. (I think I need more time than I've got right now, to avoid making another goof.)
Nov
5
comment Where's the energy in a boosted capacitor?
@BenCrowell, thank you for this comment (and sorry for my earlier snark). I think there is a way around the divergence-issue for electrostatic systems, which I have added to my answer (in a major re-write). I hope you can take a look. Thanks again.
Nov
5
revised Where's the energy in a boosted capacitor?
major re-write to answer objection
Nov
5
comment Where's the energy in a boosted capacitor?
OK I see what you're doing. I should have read your post and previous comments more carefully before commenting; I see you've explained all this before. Sorry. Thanks for being patient.
Nov
4
comment Where's the energy in a boosted capacitor?
I think your argument is undermined by an incorrect formulation of the field energy: $\int T^{00} d^3x$ is not covariant. It should be $\int T^{0 \nu} n_\nu (\gamma d^3x)$.
Nov
4
revised Where's the energy in a boosted capacitor?
typos, added argument and discussion
Nov
3
comment What does a relativistically moving capacitor “look” like?
@BenCrowell, you are correct, thanks. The important thing is to get the kinematic factors right.
Nov
3
revised What does a relativistically moving capacitor “look” like?
fixed typos, added energy analysis
Nov
2
comment What does a relativistically moving capacitor “look” like?
@BenCrowell: The other question asks only about energy; this one casts a broader net (oh dear, that's discouraged by SE, isn't it?) which got me, at least, thinking in a different direction.