There’s a simple way to measure the speed of sound. It’s low tech and unimpressive, but you get to blast an air horn. How many times can you say that you’re using one for science and not sheer ...

A demonstration of the key points of the required practical to measure the frequency, wavelength and speed of waves in a ripple tank for GCSE physics and combined science.

You can use chocolate, cheese, or even marshmallows to microwave at the speed of light. Here's exactly how to do it.