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Waves transfer energy from one place to another.

Learn about how waves are measured according to amplitude, wavelength and frequency.

All waves will reflect and refract in the right circumstances. The reflection and refraction of light explains how people see images, colour and even optical illusions.

Sound is caused by the vibration of particles but not all vibrations can be heard as sound. Common ideas about sound come from the limited range of vibrations that human ears can detect.

Electromagnetic waves are transverse waves with a wide range of different properties and uses.