Periodic Videos

Amazing piece of metal (speculum) (2014x3)

Air date: Feb 05, 2014

This small disc of metal - made from speculum - is an important part of history. The metal is an alloy of tin and copper with some arsenic thrown in. Discussed by Professor Martyn Poliakoff at the Royal Society, in London. It is the primary mirror from Sir Isaac Newton's original reflecting telescope. Brady inside big telescopes: http://bit.ly/telescopetours More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos From the School of Chemistry at The University of Nottingham: http://bit.ly/NottChem Periodic Videos films are by video journalist Brady Haran: http://www.bradyharan.com/ A run-down of Brady's channels: http://bit.ly/bradychannels