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I'm trying verify the proof of the sum rule for the one-dimensional harmonic oscillator:$$sum_l^infty (E_l-E_n) | langle l |p| n rangle |^2 = frac {mh^2w^2}{2} $$...
Asked on 01/13/2021 by Nad
1 answerI am trying to find continuous function $sigma(x)$ for uniform intensity. I set two parallel horizontal lines with length $W$ and with distance each other $H$. The...
Asked on 01/12/2021
0 answerActually, this is part of a homework question in my classical mechanics class. The question requires me to derive the eigenfrequencies of the acetylene molecule's bending and stretching modes under...
Asked on 01/12/2021
1 answerFor a sphere of uniform density, we know an orbiting mass experiences a net attraction only by the mass inside its orbit, and that the mass outside its orbit exerts...
Asked on 01/12/2021
3 answerthe electromagnetic induction: is it a magnetic force (Lorentz Force) or an electric force generated by the temporal variation of the magnetic field (Faraday's law)?...
Asked on 01/12/2021 by user157308
2 answerTopic: Quantum Theory of Solids I have come across the following text:Electron in Free Space: Consider the motion of an electron in free space. If there is no force...
Asked on 01/12/2021 by Anwesa Roy
4 answerDo smaller organisms (eyes) see smaller objects in greater clarity? With the human eye, as I get "closer" to something, I can see it in greater clarity, does this "relative...
Asked on 01/12/2021
1 answerClassically, black holes can merge, becoming a single black hole with an horizon area greater than the sum of both merged components. Is it thermodynamically / statistically possible to split...
Asked on 01/12/2021 by lurscher
4 answerIn Supersymmetry and Morse Theory (1982) by E Witten, Concern whether the supersymmetry is broken by checking whether$$Q | 0 rangle=0$$exists or...
Asked on 01/12/2021
0 answerI am trying to calculate the redshift drift where its written as $$frac{dz}{dt} = (1+z)H_0 - H tag{1}$$ We also know that $$1+z = a(t_o) / a(t_e) tag{2}$$...
Asked on 01/12/2021
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