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Sound — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceSound1 Mark
Question
A pulse is allowed to get reflected from a wall. Then:
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Answer

  1. Compression becomes rarefaction.
Explanation:
The frequency of a wave is not altered by crossing a boundary. The reflected pulse becomes inverted when a wave in a less dense rope is heading towards a boundary with a more dense rope. The amplitude of the incident pulse is always greater than the amplitude of the reflected pulse.

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