How has Albert Einstein’s work on photons ushered in a golden age of light? Oliver Morton, The Economist's briefings editor, explores why the laser's applications have been spectacular and how solar power became the cheapest source of electricity in many countries. Also, he talks to the scientists scanning the skies with the largest digital camera in the world.

Please subscribe to The Economist for full access to print, digital and audio editions:

www.economist.com/podcastoffer

Hosted on Acast. See acast.com/privacy for more information.