Make your own CD spectrometer

Examine the composition of light with just a cereal box and a CD

How do we know what the stars are made of when we've never been to one? Dr Andrew Steele shows us how to make a spectrometer, a device used by scientists to analyse light, using a cereal box and a CD.


Written and presented by Andrew Steele
Videography by Tom Fuller and Andrew Steele
Telescope images courtesy of NASA, ESA, Hubble, AURA/Caltech

Lab, Camera, Action! is released under a Creative Commons Attribution–Non-commercial–Share-alike license.