Hi. Hoping for some help with the following questions - 1 - Are there any momentum eigenstates in a box ? I think the answer is no because if i solve the momentum eigenvalue equation in 1-D i get Aikx but it seems impossible to get this to meet the boundary conditions 2 - As far as I know a free particle has the following wavefunction ψ = Aikx but if i solve Scrodingers time independent equation i get ψ = Aikx + B-ikx which is a standing wave and the wavefunction for a particle in a box. What am I doing wrong ? 3 - Are the position eigenstates for a free particle and a particle in a box the same ? Given by δ(x-x0 ) ?