Why This Universe?

100 - What is Light? A Journey from Ancient Philosophy to Quantum Physics

August 24, 2026·36 min
Episode Description from the Publisher

Modern physics tells us a lot about light; that it's both a wave and a particle, and that it sets the speed limit of the universe, for example. But how did we come to understand light in this way? In Dan's first solo episode, he takes us through theories of light through the ages, starting from the earliest accounts of ancient ideas and bringing us all the way to modern times. Let us know what you think about this new format! Support the show

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