Question

when two waves interfere destructively, what changes?
a. the frequency
b. the wavelength
c. the wave speed
d. the amplitude

Explanation:

In destructive wave - interference, the waves are out - of - phase and their amplitudes subtract from each other. Frequency, wavelength, and wave speed remain unchanged as they are properties related to the source and the medium, not directly affected by interference in terms of changing their fundamental values.

Answer:

D. The amplitude