Brian Cox demonstrates why atoms are empty

17 December 2011 Last updated at 19:22 ET Help

Brian Cox gives a science lesson to celebrities. The comedian Simon Pegg and physicist Jim Al-Khalili help him explain standing waves in a demonstration to show why atoms are so large and empty.

BBC Two's A Night With The Stars is broadcast on Sunday 18 December 2011 at 21:00 GMT. Or watch later on BBC iPlayer.

BBC © 2013 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.