Practice free →
HomeCBSE Class 9physicssoundwaves › Sound CANNOT travel through:

Sound CANNOT travel through:

AWater
BAir
CVacuum
DSteel
Answer & Solution
Correct answer: C. Vacuum
Sound is a vibration of particles of a medium. A vacuum has no particles to vibrate, so sound cannot propagate through it. Astronauts on a spacewalk cannot hear each other through the vacuum of space — they communicate via radio (electromagnetic waves, which need no medium).
Solve this in the app — CBSE Class 9 practice & 24k+ MCQs →
Related questions