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The real question: Water vapor absorbs photons at 950nm -- does that mean that it reemits a photon at 950nm later, or does it heat up, emit photons at a...
Asked on 07/19/2021 by TimWescott
0 answerI've been looking into the quantum mechanics of MO Theory and I stumbled across parity symmetries of atomic and molecular wavefunctions. In short, I understand how the parity operator ...
Asked on 07/19/2021 by studious-tuna
0 answerIn Shankar's Chapter on addition of angular momentum in his Principles of Quantum Mechanics (Chapter 15 of the 2nd edition), he includes the section attached after describing the basic strategy...
Asked on 07/19/2021
2 answerThe self-dual Yang-Mills theory (gauge group $G$) with the action:$$mathcal{S} = int_{M} text{Tr} (B^{+} wedge F)$$where $B^{+}$ is a self-dual field, transforming in...
Asked on 07/19/2021
0 answerWe're not sure if wormholes can be held open, but we know they can exist, at least on quantum levels. I just watched a video where a physicist mentions that...
Asked on 07/19/2021
1 answerQ)A point source of light is placed at the centre of curvature of a hemispherical surface. The radius of curvature is r and the inner surface is completely reflecting. Find...
Asked on 07/19/2021 by TheQuestioner
1 answerPossible source of confusion -For work done carrying a unit charge from Point 1 to Point 2, ie the Potential difference, is itVoltage, $(V_{21}:)=V_2:-V_1:$OR is itVoltage, $(V_{12}:)=V_2:-V_1:$Secondly, when...
Asked on 07/19/2021
1 answerWikipedia and other sources define holonomic constraints as a function $$ f(vec{r}_1, ldots, vec{r}_N, t) equiv 0, $$ and says the number of degrees of freedom in...
Asked on 07/18/2021 by Christian Schnorr
1 answerI know that we can pick a set of basis (discrete or continuous) to represent the wave function. Can we represent a wave function without using any basis? If no,...
Asked on 07/18/2021 by user283058
1 answerIn quantum mechanics, we have Feynman's path integral:begin{eqnarray}langle x_{f},t_{f}| x_{i},t_{i}rangle = int {cal D}x expbigg{(}iint_{t_{i}}^{t_{f}}dt, L(x,dot{x}) bigg{)}tag{1}label{1}end{eqnarray}Here, the notation means:$$|x,trangle = e^{frac{i}{hbar}tH} |xrangle$$...
Asked on 07/18/2021
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