At a location that is 3.00 m from wave source A and 4.20 m from wave source B, constructive interference occurs. Source A and source B are coherent and in phase. What is the maximum wavelength of the waves?
A)2.40 m
B)12.6 m
C)0.60 m
D)1.20 m
E)There is no maximum wavelength.

Question

Quizplus · Accepted Answer

Constructive interference occurs when the path difference is an integer multiple of the wavelength. The path difference here is 4.20 m - 3.00 m = 1.20 m. For maximum wavelength, this path difference should equal one wavelength, so the maximum wavelength is 1.20 m.

At a Location That Is 3