The Science of Lightbulbs and Compact Discs

30 January 2009
Presented by Dave Ansell.

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Do energy saving lightbulbs give you headaches? How do LED lights work? How do CD's show us the spectrum of light? Can we see magenta in the spectrum? We tackle these question on this week's show. We also find out how trrains stay on their tracks and whether it's possible to communicate when tarvelling faster than the speed of sound!

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