Recent content by Bananen

Hi, I have an assignment to derive the two following expressions: R(J)-P(J)=2B'(2J+1) R(J-1)-P(J+1)=2B''(2J+1) where Bis the rotational constant and prime ' stands for upper level and bis '' for lower level. Bv=Be-α(v+1/2) using the selection rules (I guess in this case ΔJ=±1) and...

Pixel: I'm doing old exams in preparation for my own so I calculate exam problems and checking my answers by looking at the solutions. They don't write the numbers out just the formula and then the answer so it's not very helpful

Thank you, yes something must be wrong. It's very strange! But thank you for your answer.

Hi, I'm having trouble calculating the normalized frequency for a multimode fiber. Here's the formula: V=(2π/λ)⋅a⋅√(n12-n22) where λ=900 nm, a=200μm, n1=1.460, n2=1.455 Here's how I plug in the numbers: V=(2π/(900*10-9))⋅(200*10-6)⋅√(1.4602-1.4552)=167This is an easy calculation I know...

Yes okay I know where to never ask for help again thank you very much

I'm sorry for being vague and not knowing how to use LaTex, to me it's perfectly readable. However I didn't come here to be talked down to, I wanted some kind of help to get going with my assignment. This assignment is something my teacher has come up with so there's not really anything...

A particle is in its ground state of an infinite square well of width a <xl i>=√2/a*sin(πx/a) and since it's an eigenstate of the Hamiltonian it will evolve as <xlα(t)>=√2/a*sin(πx/a)e^(-iE1t/ħ) where E=π2ħ2/2ma2 If the well now suddenly expands to witdh 2a If the well suddenly expands to 2a...

Hi! I need help with the following question: A system has two energy levels, ε and ε1 that can be occupied by fermions (spin=1/2) that are non-interacting from a reservoir at temperature T and chemical potential μ. Compute the avarage occupation number of the state with energy ε. I have...