Final answer:
The statement is false because the amplitude of one wave can be affected by another through interference, regardless of whether they are precisely aligned or not.
Step-by-step explanation:
The statement 'The amplitude of one wave is affected by the amplitude of another wave only when they are precisely aligned' is false. In physics, particularly when discussing waves, the concept of interference plays a crucial role in understanding how the amplitudes of different waves can affect each other. The phenomenon where two or more waves superimpose to form a composite wave is what can affect the amplitude. This can occur when waves meet, and do not have to be precisely aligned. If they are in phase, constructive interference occurs, increasing the amplitude, but if they are out of phase, they can cause destructive interference, decreasing the amplitude.