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Maxwell's equations in medium without charges readbegin{align}0&=nablacdot D,,\0&=nablacdot B,,\0&=nablatimes E + dot B,,\0&=nablatimes H - dot D,.end{align}Here, $D = varepsilon E$...
Asked on 01/01/2021
2 answerDuring the breakfast with my colleagues, a question popped into my head: What is the fastest method to cool a cup of coffee, if your only available instrument is a...
Asked on 01/01/2021 by fortran
22 answerAs far as I've understood, instantons like the sphaleron can give rise to processes that violate $B+L$ but conserve $B-L$, where the baryon and lepton number can only...
Asked on 01/01/2021 by Kasper
0 answerAcross a surface the potential is continuous so:$V_{text {above }}=V_{text {below. }}$ Taking the negative gradient both sides we have $-nabla V_{text {above }}=-nabla V_{text {below...
Asked on 01/01/2021
1 answerIn case of intrinsic semiconductor, while applying an electric field, only drift current should exist, right? As diffusion current is due to concentration gradient. So the electron flow will be...
Asked on 01/01/2021 by Hchavan
2 answerI have heard that if you take a measurement $T_1$ and wait, then take another measurement $T_2$ and then find $Delta T = T_2 - T_1$. Then...
Asked on 01/01/2021
2 answerSay you have a mass on a string being twirled around in a circle by your fingers at a constant angular velocity , and then you increase its angular velocity...
Asked on 01/01/2021 by Dubious
1 answerso i am looking into Landau Diamagnetism and am reading Dupre's paper. I am slightly confused at where he has got a term in his value of E from. ...
Asked on 01/01/2021 by xhtxht
1 answerI have a box which contains a few thousand atoms, and I would like to be able to calculate a single number which gives some indication of how ordered their...
Asked on 01/01/2021 by masher
2 answerLook at this photo taken in France during the 1999 solar eclipse which I found on Wikipedia. Why does the corona appear white? It has a temperature of...
Asked on 01/01/2021 by Peanutlex
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