Final answer:
The statement is false; waves can interact and affect each other's amplitude through constructive or destructive interference, without the need for precise alignment.
Step-by-step explanation:
The statement that the amplitude of one wave is affected by the amplitude of another wave only when they are precisely aligned is false. Waves can interact with each other through a process called interference, which can occur even when they are not perfectly aligned. There are two primary types of interference: constructive interference and destructive interference. Constructive interference happens when the peaks (or troughs) of two waves add together to create a wave of larger amplitude, and destructive interference occurs when a peak and a trough meet, resulting in a wave of reduced amplitude. This interaction doesn’t require the waves to be precisely aligned; it depends on the relative phase difference between the waves.