A particle of mass m is trapped in a three-dimensional rectangular potential well with s...

A particle of mass m is trapped in a three-dimensional rectangular potential well with sides of length L, and 2L. Inside the box V = 0, outside V = ∞. Assume that

inside the well. Substitute this wave function into the Schrödinger equation and apply appropriate boundary conditions to find the allowed energy levels. Find the energy of the ground state and fi rst four excited levels. Which of these levels are degenerate?