Exam-style question
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Which statement best describes interference?.
- A.The change in wave speed at a boundary
- B.The bending of waves around obstacles
- C.The superposition of two or more waves resulting in a new wave pattern
- D.The reflection of waves off surfaces
Model answer
What a good answer should say
- The superposition of two or more waves resulting in a new wave pattern
Explanation
Why this works
Interference is defined as the superposition of two or more waves resulting in a new wave pattern, which can be constructive or destructive depending on the phase relationship of the waves. This phenomenon occurs when waves overlap, leading to regions of increased or decreased amplitude.
In contrast, diffraction involves bending around obstacles, and refraction involves a change in wave speed at a boundary. Therefore, interference specifically describes the interaction of overlapping waves.
Common mistake
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