How the metre changed the world
The history of metre and length measurement, with Robert Crease, Marc Himbert, Jahnavi Phalkey and Quentin Cooper.
Nowdays, if you want to find out how long one metre is, you can use a tape measure or, if you are a scientist, you can calculate the distance that light travels in a vacuum in 1/299 792 458 seconds. But how did we decide on what length a metre should be in the first place?
To follow the far-from-straight story of the metre Quentin Cooper is joined by Professor Robert Crease, historian of science at Stonybrook University in the USA; Professor Marc Himbert, Scientific director of the Metrology Laboratory at CNAM in Paris; and Dr. Jahnavi Phalkey, historian of contemporary and twentieth century science and technology at King鈥檚 College in London.
Photo: Lilian Bourgeat's art creation 'Tape Measure', France 2013 (Getty Images)
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Metric Failure: Why the US resists adopting the metre
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The first step to a joined-up world
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- Sat 29 Apr 2017 19:06GMT91热爆 World Service except East and Southern Africa, News Internet & West and Central Africa
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- Tue 2 May 2017 08:06GMT91热爆 World Service except News Internet
- Tue 2 May 2017 17:06GMT91热爆 World Service Australasia
- Tue 2 May 2017 23:06GMT91热爆 World Service except News Internet
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