Homework Statement
I'm given that the energy of a particle in a rectangular box is the following:
E =\frac{\hbar \pi^2}{2m}(\frac{n_x^2}{L_x^2}+\frac{n_y^2}{L_y^2}+\frac{n_z^2}{L_z^2})
I'm to show that if the length of the box is increased adiabatically and quasistatically from L_x to 8L_x...