Exam-style question
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What is the result of the superposition of two progressive waves that are in phase?.
- A.Destructive interference occurs
- B.The amplitude of the resultant wave is the sum of the individual amplitudes
- C.The frequency of the resultant wave is halved
- D.The speed of the resultant wave is doubled
Model answer
What a good answer should say
- The amplitude of the resultant wave is the sum of the individual amplitudes
Explanation
Why this works
When two progressive waves are in phase, their amplitudes add constructively, resulting in a wave with a greater amplitude. This is a direct application of the principle of superposition.
Common mistake
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