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IGCSE Physics Waves

Unit 1
Electromagnetic spectrum
Introduction to the Electromagnetic SpectrumElectromagnetic Waves in DetailElectromagnetic Spectrum Examples
Unit 3 • Chapter 1

What is Sound?

Video Summary

Sound is a wave that travels through matter. It is created when an object vibrates and causes the molecules around it to vibrate. The frequency of the sound wave determines its pitch, and the loudness of the sound wave is measured in decibels. Sound waves can travel through solids, liquids, and gases, but they cannot travel through a vacuum.

Knowledge Check

Sound is a wave of what?

A sound wave with high frequency is called?

What is the difference between sound and noise?