Treatise On Light (Illustrated Edition)

Treatise on Light (Illustrated Edition) - Christiaan Huygens I understood Huygens when he was presenting his argument that light travels in waves at a defined speed, but then he thought he should prove it and he lost me. His geometric proofs describing the differences in refraction are probably something geometers rave over, but I couldn’t appreciate it. Which is most of the book. Another book I’m not remotely qualified to rate.