After looking at sound last time, Brian attempts to follow through by 'listening to light'.

But is that plausible or should he just look at sound again?

After all, listening to light seems uncomfortably close to the discipline of laboratory physics - and Brian doesn't have the pre-requisite white coat.

Written and performed by Graham Fellows.

Additional research by Rex Brough.

Producer: Dawn Ellis.

First broadcast on BBC Radio 4 in June 2005. Show less