Superconductivity
In Our Time23 Feb 2023

Superconductivity

Melvyn Bragg and guests discuss the discovery made in 1911 by the Dutch physicist Heike Kamerlingh Onnes (1853-1926). He came to call it Superconductivity and it is a set of physical properties that nobody predicted and that none, since, have fully explained. When he lowered the temperature of mercury close to absolute zero and ran an electrical current through it, Kamerlingh Onnes found not that it had low resistance but that it had no resistance. Later, in addition, it was noticed that a superconductor expels its magnetic field. In the century or more that has followed, superconductors have already been used to make MRI scanners and to speed particles through the Large Hadron Collider and they may perhaps bring nuclear fusion a little closer (a step that could be world changing).

The image above is from a photograph taken by Stephen Blundell of a piece of superconductor levitating above a magnet.

With

Nigel Hussey Professor of Experimental Condensed Matter Physics at the University of Bristol and Radbout University

Suchitra Sebastian Professor of Physics at the Cavendish Laboratory at the University of Cambridge

And

Stephen Blundell Professor of Physics at the University of Oxford and Fellow of Mansfield College

Producer: Simon Tillotson

Det här avsnittet är hämtat från ett öppet RSS-flöde och publiceras inte av Podme. Det kan innehålla reklam.

Avsnitt(1107)

In Our Time Returns for a New Series

In Our Time Returns for a New Series

In Our Time returns for a new series with host Misha Glenny.A world class seminar, every week. In Our Time explores the ideas, people and discoveries that have shaped our world, spanning history, phil...

7 Sep 2min

Archive: Empress Dowager Cixi

Archive: Empress Dowager Cixi

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His fifth choice, first released in May 2024, is the Empress Dowager Cixi, the woman who, for almost ...

3 Sep 51min

Archive: Plate Tectonics

Archive: Plate Tectonics

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His fourth choice, first released in January 2008, explores how the science of plate tectonics revolu...

27 Aug 44min

Archive: Hatshepsut

Archive: Hatshepsut

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His third choice, first released in November 2014, is the Egyptian pharaoh Hatshepsut, whose name mea...

20 Aug 47min

Archive: Coffee

Archive: Coffee

Misha Glenny delves in to the In Our Time archive to select ten episodes for listeners to revisit. His second choice, first released in December 2019, is the history and social impact of coffee. From ...

13 Aug 56min

Pockets (from Here For The History)

Pockets (from Here For The History)

To the frustration of many, a lot of women’s clothes don’t have pockets. But why on Earth is that the case? Especially when men’s clothing seems to be full of pockets.On Here For The History, Alice Lo...

7 Aug 37min

Archive: Aphra Behn

Archive: Aphra Behn

Widely regarded as the first professional woman writer in English literature, Aphra Behn (1640-1689) is best known for her plays and her novel Oroonoko, she's been an inspiration to countless writers ...

6 Aug 52min

Seashells

Seashells

Misha Glenny and guests discuss a familiar feature of our beaches: seashells, from their astonishing shapes and patterns that teach us about Earth’s oceans, to the ways that humans have treasured shel...

30 Juli 53min

Populärt inom Historia

kod-katastrof
massmordarpodden
historiska-brott
sanna-berattelser
p3-historia
historiepodden-se
olosta-mord
motiv
rss-massmordarpodden
rss-historien-om-2
historianu-med-urban-lindstedt
rss-brottsligt
krigshistoriepodden
nu-blir-det-historia
harrisons-dramatiska-historia
rss-folkets-historia
militarhistoriepodden
rss-historiens-mysterier
palmemordet
rss-borgvattnets-hemligheter