Sound as a Wave

Sound as a Wave

Physics – Leaving Cert

Quick Notes

Sound as a wave

Sound is caused by a vibrating object. The sound travels away from this object as a longitudinal wave.

The vibrating object causes air molecules around it to vibrate, this vibration travels through the air as a series of compressions and rarefractions. When the wave hits the eardrum, the eardrum starts to vibrate with the same frequency – i.e the frequency of the source of the sound.

Proof that sound is a wave – sound shows all the pr...

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