1) Work by René Descartes
Found on
https://www.crosswordclues.com/clue/dioptrique
La dioptrique (in English Dioptrique, Optics, or Dioptrics), is a short treatise published in 1637 included in one of the Essays written with Discourse on the Method by Rene Descartes. In this essay Descartes uses various models to understand the properties of light. This essay is known as Descartes` greatest contribution to optics, as it is the ....
Found on
http://en.wikipedia.org/wiki/Dioptrique
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