Homework Statement
We have an ordinary LRC circuit with inductance L, capacitance C and resistance R with an oscillating voltage with low frequency (U^e). Using the energy conservation law and Poynting's theorem, find the differential equation:
$$L \frac{\partial ^2}{\partial t^2}I + R...
First, sorry if something is not totally clear, I'm translating physics term the best I can!
1. Homework Statement
A sphere or radius a of permittivity ε2 is placed in a dielectric ε1. Without the sphere, we would have E = E0. We want to find the solution to this problem when ε2 = 1...
Well I tried something but never got to the energies...anyway, my deadline was tomorrow so I should have the solutions by the weekend.
I certainly won't have 100% but if I have anything more than 0 it will be because of you! Thank you very much for your time, much appreciated! You helped me a lot!
H \Psi = \left( \begin{array}& 0 & \sqrt{2} & 0 \\ -\sqrt{2}& 0 & \sqrt{2} \\ 0 & \sqrt{2} & 0 \end{array} \right) \Psi
Thanks a lot! I guess I only have to find the stationary states from this matrix?
The stationary states would be the line vectors of the matrix is that right? So something...
Yes I do know about raising and lowering operators, that I guess I will have to find in terms of $L_u, L_v$ right?
But I'm stuck at the very basic. I don't know where to start to write $H$ in a basis. I can't find any example on the web that is even remotely similar to this question.
Thanks...
I read this section of my book at least 100 times and I still have no idea how to start this problem. If I start with what you just gave me, how can I compute the values ##\alpha , \beta , \gamma## ? Of maybe you know somewhere else where that is explained?
So I figured ##L_v = \frac{L_z - L_x}{\sqrt{2}}##
But I don't see how to convert that into a matrix. We use Griffiths and I feel like my book is not really helping me on that :S
Hi guys,
I'm having a hard time with that one from Cohen-Tannoudji, ##F_{VI}## # 6. I'm translating from french so sorry if some sentence are weird or doesn't use the right words.
1. Homework Statement
We consider a system of angular momentum l = 1; A basis from it sub-space of states is...
Oh, and while I'm there,
I also need to prove that ##<H> <= E_{1}##, where ##E_{1}## is the fundamental energy. How will I proceed to do that?
Do I need to compute ##E_{1}##? Cause if I do, I'll end up with terms in ##\psi_{1}## that I'm not quite sure how to compare with ##\psi_{n}##