Bad Qubits — Learn Quantum by Doing

|q⟩ Bad Qubits

Multiple choice

When two angular momenta with quantum numbers j1 and j2 are combined, which values of the total quantum number j are allowed?

Only the single value j = |j1 - j2|
Every real value between 0 and j1 + j2 continuously
j runs from |j1 - j2| up to j1 + j2 in integer steps
Only the single value j = j1 + j2