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Two identical waves arrive crest on trough, so the amplitude of the result is:
AThrice
BThird
CZero
DTwice
Answer & Solution
Correct answer: C. Zero
1. The disturbances point in opposite directions everywhere.
2. They cancel each other completely.
3. The amplitude falls to zero.
_Source: OpenStax College Physics 2e, Chapter 16, Oscillatory Motion and Waves._
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