Plasma
In Our Time13 Okt 2016

Plasma

Melvyn Bragg and guests discuss plasma, the fourth state of matter after solid, liquid and gas. As over ninety-nine percent of all observable matter in the Universe is plasma, planets like ours, with so little plasma and so much solid, liquid and gas, appear all the more remarkable. On the grand scale, plasma is what the Sun is made from and, when we look into the night sky, almost everything we can see with the naked eye is made of plasma. On the smallest scale, here on Earth, scientists make plasma to etch the microchips on which we rely for so much. Plasma is in the fluorescent light bulbs above our heads and, in laboratories around the world, it is the subject of tests to create, one day, an inexhaustible and clean source of energy from nuclear fusion.

With

Justin Wark Professor of Physics and Fellow of Trinity College at the University of Oxford

Kate Lancaster Research Fellow for Innovation and Impact at the York Plasma Institute at the University of York

and

Bill Graham Professor of Physics at Queens University, Belfast

Producer: Simon Tillotson.

Episoder(1086)

Oliver Goldsmith

Oliver Goldsmith

Melvyn Bragg and guests discuss the renowned and versatile Irish writer Oliver Goldsmith (1728 - 1774). There is a memorial to him in Westminster Abbey’s Poet’s Corner written by Dr Johnson, celebrati...

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Catherine of Aragon

Catherine of Aragon

Melvyn Bragg and guests discuss Catherine of Aragon (1485-1536), the youngest child of the newly dominant Spanish rulers Ferdinand and Isabella. When she was 3, her parents contracted her to marry Ar...

13 Mar 202552min

Sir John Soane

Sir John Soane

Melvyn Bragg and guests discuss the architect Sir John Soane (1753 -1837), the son of a bricklayer. He rose up the ranks of his profession as an architect to see many of his designs realised to great ...

6 Mar 202553min

Pope Joan

Pope Joan

Melvyn Bragg and guests discuss a story that circulated widely in the middle ages about a highly learned woman who lived in the ninth century, dressed as a man, travelled to Rome, and was elected Pope...

27 Feb 202546min

Socrates in Prison

Socrates in Prison

Melvyn Bragg and guests discuss Plato's Crito and Phaedo, his accounts of the last days of Socrates in prison in 399 BC as he waited to be executed by drinking hemlock. Both works show Socrates prepar...

20 Feb 202550min

The Battle of Valmy

The Battle of Valmy

Melvyn Bragg and guests discuss one of the most consequential battles of recent centuries. On 20th September 1792 at Valmy, 120 miles to the east of Paris, the army of the French Revolution faced Prus...

13 Feb 202547min

Slime Moulds

Slime Moulds

Melvyn Bragg and guests discuss slime mould, a basic organism that grows on logs, cowpats and compost heaps. Scientists have found difficult to categorise slime mould: in 1868, the biologist Thomas Hu...

30 Jan 202551min

Vase-mania

Vase-mania

Melvyn Bragg and guests discuss eighteenth century 'vase-mania'. In the second half of the century, inspired by archaeological discoveries, the Grand Tour and the founding of the British Museum, parts...

23 Jan 202556min

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