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Sound — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceSound1 Mark
MCQ
Compressions and rarefactions are seen in:
  • A
    Longitudinal and transverse waves
  • ✓
    Longitudinal waves only
  • C
    Transverse waves only
  • D
    None
✓

Answer

Correct option: B.
Longitudinal waves only
Longitudinal waves propagate in a medium in the form of compressions and rarefactions . When pressure becomes high , medium particles come closer and a compression is formed and due to low pressure , rarefaction is formed.
Transverse waves propagate in the form of crests and troughs.

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