(d)According to theory, two waves with exactly the same amplitude and frequency can either reinforce (if they are in phase) or cancel (if 180° out of phase). However, when two musical instruments play the same note, it is always louder, and never softer. Discuss in detail why this is the case.
When two musical instruments play the same note, it is always louder, and never softer. Discuss in detail why this is the case.
