For particle in a box with the finite depth, is it traveling wave? or standing wave? I am confused with its ability to pass through the potential walls that is classically forbidden area which makes me think it is traveling wave. But for particle in a box with infinite potential, I understand that it is standing wave since the presence of infinite potential walls makes a restriction towards the wave function. So, I kind of have no idea if it is traveling wave or standing wave for particle in a box with the finite depth. Help me please, thank you.