A trough meeting a crest causes the wave to cancel each other out, thus being at rest.
Answer2:
Destructive interference.
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Destructive interference occurs when two waves interact and their amplitudes cancel out. This happens when the peaks of one wave align with the troughs of another, resulting in a net decrease in amplitude at that point.
When two out-of-phase waves combine and cancel each other out.
The interaction between two seismic waves that meet is called interference. Interference can result in constructive interference, where the amplitudes of the waves combine to create a larger wave, or destructive interference, where the amplitudes partially or completely cancel each other out.
When waves combine with each other, it is called interference. Interference can be constructive, where the amplitudes of the waves add up, or destructive, where the amplitudes cancel each other out.
When two waves meet, it is called interference. Interference can result in either constructive interference, where the amplitudes of the waves add together, or destructive interference, where the amplitudes cancel each other out.