Given:
Statement: Destructive interference of two identical waves means the waves are exactly one wavelength out of phase.
Required: To determine whether the given statement is true or false
Step-by-step explanation:
Destructive interference occurs when crest of one wave coincides with trough of another wave.
In this way, the resultant amplitude of the resultant wave will be zero.
Any wave is called out of phase when either one of the wave advances or lag by some distance.
One wavelength out of phase means the second wave will start by one wavelength.
So, in this case both the crests and troughs of the waves coincide.
Final Answer: The given statement is false.