The Curious Cases of Rutherford and Fry

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The Curious Cases of Rutherford & Fry

Podcasts

Factual: Science & Nature

Factual: Science & Nature: Science & Technology

Science sleuths Dr Adam Rutherford and Dr Hannah Fry investigate everyday mysteries.

Science sleuths Dr Adam Rutherford and Dr Hannah Fry investigate everyday mysteries sent by listeners.

BBC Radio 4 LW

The Curious Cases of Rutherford & Fry: Series 20: The Problem of Infinite Pi(e)

The Problem of Infinite Pi(e)

Series 20

BBC Radio 4 - The Curious Cases of Rutherford & Fry, Series 20, The Problem of Infinite Pi(e)

'How did we discover pi? How do we know that it’s infinite and never repeats?' asks Alex.

Dr Rutherford and Professor Fry explore the bizarre and mysterious properties of the number pi.

Hungry for pi? Chow down on this! 

Pi is the ratio between a circle’s diameter and its circumference. Sounds dull – but pi turns out to have astonishing properties and crop up in places you would never expect. For a start, it goes on forever and never repeats, meaning it probably contains your name, date of birth, and the complete works of Shakespeare written in its digits.  

Maths comedian Matt Parker stuns Adam with his ‘pie-endulum’ experiment, in which a chicken and mushroom pie is dangled 2.45m to form a pendulum which takes *exactly* 3.14 seconds per swing.  

Mathematician Dr Vicky Neale explains how we can be sure that the number pi continues forever and never repeats - despite the fact we can never write down all its digits to check! She also makes the case that aliens would probably measure angles using pi because it’s a fundamental constant of the universe.  

NASA mission director Dr Marc Rayman drops in to explain how pi is used to navigate spacecraft around the solar system. And philosopher of physics Dr Eleanor Knox serves up some philoso-pi, revealing why some thinkers have found pi’s ubiquity so deeply mysterious.  

Hannah grins with delight for most of show. It’s all maths! 

Producer: Ilan Goodman

Contributors: Matt Parker, Dr Vicky Neale, Dr Marc Rayman, Dr Eleanor Knox

The Curious Cases of Rutherford & Fry: Series 20

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The Curious Cases of Rutherford & Fry

Series 20

The Problem of Infinite Pi(e)

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