In Our Time: Science - Cosmic Rays

Download Cosmic Rays

Melvyn Bragg and his guests discuss cosmic rays. In 1912 the physicist Victor Hess discovered that the Earth is under constant bombardment from radiation coming from outside our atmosphere. These so-called cosmic rays have been known to cause damage to satellites and electronic devices on Earth, but most are absorbed by our atmosphere. The study of cosmic rays and their effects has led to major breakthroughs in particle physics. But today physicists are still trying to establish where these highly energetic subatomic particles come from.

With:

Carolin Crawford Gresham Professor of Astronomy and a member of the Institute of Astronomy at the University of Cambridge

Alan Watson Emeritus Professor of Physics at the University of Leeds

Tim Greenshaw Professor of Physics at the University of Liverpool.

Producer: Thomas Morris.

Published on Thursday, 16th May 2013.

Available Podcasts from In Our Time: Science

Subscribe to In Our Time: Science

We are not the BBC, we only list available podcasts. To find out more about the programme including episodes available on BBC iPlayer, go to the In Our Time: Science webpage.