A general condition that two waves undergo destructive interference is
A) their phase difference is zero.
B) their phase difference is $\pi$/2 rad.
C) their phase difference is $\pm\pi$/2 rad.
D) their phase difference is an even integral multiple of $\pi$ rad.
E) their phase difference is an odd integral multiple of $\pi$ rad.

Question

Quizplus · Accepted Answer

Destructive interference occurs when waves are out of phase by an odd multiple of $\pi$ radians, leading to cancellation.

A General Condition That Two Waves Undergo Destructive Interference Is π\piπ

A General Condition That Two Waves Undergo Destructive Interference Is $\pi$