Ep. 3 - Heat, Light and Electricity

Precision: The Measure of All Things

From lightning bolts and Watt engines to electromagnetic waves and single electrons, our final program looks at the measurement of light, electricity and heat. We've been using light to communicate for millennia, with fire beacons saving the British Isles from invasion, and yet only recently has it been given a unit of measurement. Temperature measurement has stumped the greatest minds in history, but can we really measure it better using the speed of sound? This episode also revisits Thomas Edison and the mystery of Absolute Zero, as we see how the drive for better measurement has led us deep into space and inside the fabric of atoms themselves.
Aired:
Jul 22, 2021
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