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Physicist Geoffrey Chew proposed the concept of bootstrap (related to S-matrix theory) where he denied that fundamental laws of nature existed at all, as it is indicated in a writing...
Asked on 09/10/2020 by vengaq
0 answerThe following is my rough understanding of topological phases of matter (please let me know if it is incorrect.) Topologically ordered phases of matter are topological in the sense that...
Asked on 09/10/2020
0 answerFive identical capacitor plates, each of area A, are arranged such that the adjacent plates are at a distance d apart. The plates are connected to a battery of e.m.f....
Asked on 09/09/2020
1 answerCan someone explain to me all about potential difference. It is basically taught when teaching about voltage but I want to know all about potential difference....
Asked on 09/09/2020 by Ses Moh
2 answerConsider the canonical and grand canonical partition functions given by $$Z_C=sumlimits_{i}g(E_i)e^{-beta E_i}$$ and $$Z_G=sumlimits_{i}g(E_i)e^{-beta (E_i-mu)}$$ respectively with $beta=frac{1}{k_BT}$.Questions $bullet$ What happens to these partition functions in...
Asked on 09/09/2020 by SRS
2 answerI would like to compute the sum of energy of the following case: Two solids are turning (disks). Yellow...
Asked on 09/09/2020 by Sx7
1 answerIn the Stern-Gerlach experiment silver atoms with random magnetic moment direction are fired through a magnetic field $vec{B}$ parallel to $hat{z}$ with a nonzero gradient $(nabla ...
Asked on 09/09/2020 by hitech physics
1 answerThe english wikipedia article https://en.wikipedia.org/wiki/Spontaneous_emission#Rate_of_spontaneous_emission (26.08.2020, 16:45) gives the rate for spontaneous emission as$$Gamma_{rad}(omega) = frac{omega^3n|mu_{12}|^2}{3pi varepsilon_0 hbar c^3}$$ Isn't this missing some...
Asked on 09/09/2020
0 answerMicrowave oven radiation makes water molecules rotate. I just wonder if there is a wavelength, supposedly related to the lattice of water ice, molecules spacing, whatever, that would set the...
Asked on 09/09/2020
0 answerI heard that first-principle band calculation in helical spin structure is difficult. Why?...
Asked on 09/08/2020 by Y. P
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