You can see explosions in space—but why can’t you hear them? Let’s uncover the science of sound!
Astronauts can see stars and planets clearly, but space is completely silent. Why doesn’t sound travel there?
In air, a ringing bell makes sound. In vacuum (no air), the bell still moves—but no sound is heard.
❌ Wrong idea: Sound travels like light. ✅ Correct idea: Sound needs a medium to travel.
Sound moves by making particles vibrate. If particles move → sound travels. If there are no particles → no sound.
In solids, particles are very close, so vibrations pass quickly. In vacuum, there are no particles, so sound cannot travel at all.
Class 8 Science: Sound Class 9 Science: Sound (waves & propagation)
