1. The problem statement, all variables and given/known data Basically, I'm dealing with part d) in this document: https://s3.amazonaws.com/iedu-attac...e728a8d7_bfbe0ba9d2f10f8ac9ef9d049934c1da.jpg. I have found that the angular momentum only depends on spatial coordinate and it doesn't on time. Is explanation that the operator itself has a derivative of angle but not time sufficient? Or should I state that if I take the squared wavefunction, e^(-iEt/h_bar) term becomes 1? Back to the question. I've been doing a lot of research online and I struggle to find how I should approach this problem in terms of finding possible outcomes and their probabilities. Don't know where to start, actually. Looking at part e), I assume I have to take particular energy values, since energy is quantized, but which ones? And how many? And how do I find the probabilities? 2. Relevant equations L = ih d/dx, I took this operator for the whole superposition state. 3. The attempt at a solution I only applied the operator to the wave function. I also noticed that this wave function is probably not an eigenfunction of L, since the derivative doesn't get me a Lf = mf relationship, which is also confusing. Really need some clear help. Would be appreciated a lot!