Many Greek scientific fields were born out of simple questions.  Optics was one such field, which was not so much the study of light, but an attempt to answer the question, "How do we see?".  This episode takes in the development of Optics over the course of around 500 years from its inception to the work of Ptolemy in the 2nd century A.D.

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Music Credit: Folk Round Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License