February 23rd, 2012
Episode 189 of 552 episodes
Melvyn Bragg and his guests discuss the physics of electrical conduction. In investigating electrical conduction scientists discovered two new classes of material. Semiconductors have given us the transistor, the solar cell and the silicon chip, and have revolutionised telecommunications. And superconductors, remarkable materials first observed in 1911, are used in medical imaging and at the Large Hadron Collider in Geneva. Melvyn Bragg is joined by Frank Close, Professor of Physics at the University of Oxford; Jenny Nelson, Professor of Physics at Imperial College London and Lesley Cohen Professor of Solid State Physics at Imperial College London.
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