alleryStart learning →Sound waves need a medium to travel through. They cannot travel through
AWater in a sealed pipe
BAir at room temperature
CVacuum
DIron rod under hammer
Answer & Solution
Correct answer: C. Vacuum
1. Sound is a mechanical wave.
2. It needs particles to pass energy along.
3. A vacuum has no particles.
4. Hence sound cannot travel through vacuum.
_Source: Selina Concise Physics Class 9, Ch 8 Sound (Mistral OCR'd PDF), section on medium_
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