Bad Qubits — Learn Quantum by Doing

Multiple choice

How does a finite (penetrable) square well of depth V_0 differ from an infinite square well of the same width regarding bound states?

The finite well has a finite number of bound states (always at least one), and each level lies below the corresponding infinite-well level
The finite well has no bound states at all unless V_0 exceeds a critical depth
Every bound level of the finite well lies above the corresponding infinite-well level
The finite well has infinitely many bound states, just like the infinite well