Content about “standing wave”

When you pluck a guitar string it vibrates at many resonant frequencies at once. What might that look like? Find out with our animation.

The Laplacian operator turns up all over maths.  Here's a reasonably light-touch introduction and a look at why it forms part of the wave equation.

On 11th August 1999 a total eclipse of the Sun will be visible from parts of the UK. It will provide a spectacular display, but why is the Sun so interesting? Helen Mason explains.