Light, Sound and Waves

The “pink” (magenta) elephant optical illusion is a great starter to a lesson on colour vision.

Practical Activity 11-14 14-16

This activity shows that a loud sound is capable of making small grains jump. You can use it to introduce the idea that sound...

Practical Activity 11-14

In this demonstration students see how a longitudinal wave can generate a sine-shaped curve. You can use it to introduce sound...

Practical Activity 14-16