The Earthball is a fantastic tool for discussing our planet with children, combining playtime with education!

Cecilia Scorza, EU-UNAWE Germany

What is Wavelength?

One of the characteristics of light is that it behaves like a wave. Different types of light have waves of different sizes. The length of the wave is called the ‘wavelength’. This is measured from the tip (crest) of one wave to the tip of the next. Radio waves, visible light (the light our eyes can see) and microwaves are the different types of light waves.