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CSS Physics QUESTION #1154
Question 1
What is the change in phase if a wave is reflected from a denser medium?
  • \(3\pi\)
  • \(0\)
  • \(\pi\)✔️
  • \(2\pi\)
Correct Answer Explanation
When a wave is reflected from a denser (more rigid) medium, it undergoes a phase change of \(\pi\) (180°). This is analogous to a transverse wave on a string being reflected from a fixed end, where the displacement is inverted.