Recent content by QuantumKyle

Thanks, that was a big help

If you know that B-left is 0 then you know what the form of the equation is on the right side (x>0) Now its just a boundary condition problem. you need to find A-left and A-right so that the two equations match up at x = 0. Set the two equations equal to each other at x = 0 and also set...

Homework Statement I need to show that < n l m | z | n l m > = 0 for all states | n l m> [b]2. relevant Equations: L^2 = Lx^2 + Ly^2 + Lz ^2 Lx = yp(z) - zp(y) Ly = zp(x) - xp(z) Lz = xp(y) - yp(x) L+/- = Lx +/- iLy The Attempt at a Solution I really don't know where to begin...