Ask The Naked Scientists

Ask the Naked Scientists episode

Fri, 13th Aug 2010

Protons, Photons and Colour-Changing Toys

Argon-ion and He-Ne laser beams (c) Jeff Keyzer from San Francisco, CA, USA

How small is a proton? What is a photon? And how do colour-changing toys work? We'll find out the answers to all these questions this week, plus find out how new stars are born, how painkillers work and the effects of salt on our bodies!

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