Ep 192: On Light, Part 2 — Toothed Wheels, Spinning Mirrors, and Meeting the President

Harry and Rafe continue the discussion around coming to understand the nature of light.  In this episode they discuss Fizeau, Foucault, and Michelson and how they used the technologies of the 18th and 19th centuries to zero in on the universal speed limit.

Along the way we run into some characters we have seen before and stumble across some serendipity that is just too good not to mention.