Two identical sound waves begin in phase, travel along different paths, and then travel in the same direction through a common point. If the path-length difference is equal to 1.0 wavelength, what type of interference occurs at the common point?
(a) Fully constructive interference.
(b) Fully destructive interference.
(c) Intermediate interference.
Interference of two coherent sound sources.
The superposition of waves of two coherent sound sources creates around the interference field.
Depending on the difference in the paths traveled by the waves from these sources, interference may be fully constructive, fully destructive or intermediate.
Answer and Explanation:
a)Fully constructive interference.
The same type of interference of the fields from two coherent co-phase sources occurs in the points,
where the difference in the paths traveled by the waves from these sources equals zero or a natural number of wavelengths.
In this case, a path-length difference equal to 1.0 wavelength, which meets these conditions.
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Learn more about this topic:
from MTEL Physics (11): Practice & Study GuideChapter 16 / Lesson 5