TSny's latest activity
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I'm a bit rusty so forgive me -- but in both of those examples, the magnetic field ##\mathbf{B}## is a constant* (in the lab frame), so... -
I used the approximation from the 3,4,5 triangle. Also, no I am not familiar with lagrangian mechanics I'm still in HS. Here's the...
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TSny replied to the thread A bead-mass oscillatory system problem.👍 I get the same result. I found the calculation to be fairly tedious. Easy to slip up.
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TSny replied to the thread I Does Poisson's equation hold due to vector potential cancellation?.In your example in post #1, ##\large \frac{\partial A_y}{\partial y} \neq 0## for points along the x-axis. So, ##\nabla \cdot \mathbf{A}...
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TSny replied to the thread I Griffith, Electrodynamics, 4th Edition, Example 4.8. (First part).That's not the reason. The assumption is more general. Free charge inside the volume of a dielectric material would have to be...
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TSny replied to the thread I Griffith, Electrodynamics, 4th Edition, Example 4.8. (First part).Intuitively, the reason that ##\sigma_b## is negative is because the field of the positive, external charge ##q## tends to pull negative...
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TSny replied to the thread I Griffith, Electrodynamics, 4th Edition, Example 4.8. (First part).@kuruman has addressed your questions. But I’ll add a few additional remarks. There are two sentences in your quote. Are you asking why...
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TSny reacted to JimWhoKnew's post in the thread I Gauss' law seems to imply instantaneous electric field propagation with
Like.
Let's take another look at your nice steady-current calculation in #5. You considered an arbitrary point ##p## at a distance ##r## from... -
TSny replied to the thread I Gauss' law seems to imply instantaneous electric field propagation.Yes. Thank you.
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TSny replied to the thread I Gauss' law seems to imply instantaneous electric field propagation.The flux through the spherical surface without including ##\partial_t A## is ##(q_o-I_ot)/\varepsilon_o##. The flux of ##-\partial_t...
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TSny replied to the thread I Gauss' law seems to imply instantaneous electric field propagation.I used Mathematica to plot the field. I definitely agree. In the case of opening the switch, you have resolved the apparent paradox...
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TSny replied to the thread I Gauss' law seems to imply instantaneous electric field propagation.This all sounds good. If the current is switched off by opening a local switch, things are quite complicated, as you have very nicely...
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TSny replied to the thread Multiple reflections in a mirror system.Good. Yes, I think so. Your two different graphical solutions with three reflections are very insightful!
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TSny replied to the thread Multiple reflections in a mirror system.Your diagrams appear to show 3 reflections before the rays form an image at S.
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TSny replied to the thread Multiple reflections in a mirror system.How many reflections are you considering?
