Constructive interference occurs only when two harmonious waves arrive at the same point with a phase difference of exactly 1 wavelength.

Question

Quizplus · Accepted Answer

Constructive interference occurs when two waves meet in phase (with a phase difference of 0, or an integer multiple of 2π radians, which corresponds to an integer number of wavelengths), not necessarily exactly 1 wavelength apart.

Constructive Interference Occurs Only When Two Harmonious Waves Arrive at the Same