The condition for constructive interference is that the phase difference between the two waves should be an even integral multiple of π or 1800.
What is the condition for constructive interference path difference?
Constructive interference occurs only when the path difference between the two waves is an integral multiple of wavelength of the wave. Destructive interference occurs only when the path difference between the two waves is an odd integral multiple of half wavelength of the wave. Hence, option C is the correct choice.
What is the condition of destructive interference?
Destructive interference occurs when the maxima of two waves are 180 degrees out of phase: a positive displacement of one wave is cancelled exactly by a negative displacement of the other wave. The amplitude of the resulting wave is zero. ... The dark regions occur whenever the waves destructively interfere.
