Phases of matter
In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform.: 86 : 3 Examples of physical properties include density, index of refraction, magnetization and chemical composition. A simple description is that a phase is a region of material that is chemically uniform, physically distinct, and (often) mechanically separable.
3 episodes
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Plasma
Melvyn Bragg and guests discuss plasma. First observed in 1879, plasma is the most abundant matter in the universe, far more than solid, liquid or gas.
13 October 2016
Featuring: Justin Wark, Kate Lancaster, Bill Graham
States of Matter
Melvyn Bragg and guests discuss the science of matter and the states in which it can exist, from solids, liquids and gases to high-energy plasmas.
3 April 2014
Featuring: Andrea Sella, Athene Donald, Justin Wark
Superconductivity
Melvyn Bragg and guests discuss ideas about why some materials lose their electrical resistance at low temperatures and expel their magnetic field and why that matters.
26 January 2023
Featuring: Nigel Hussey, Suchitra Sebastian, Stephen Blundell