above, the vacant observatory on ballgay hill
below, a few prominent historical thinkers. they understood light before anyone else
a note: this a draft post that should have been published a long time ago
alhazen
conceived the notion that light rays do not travel from our eyes, but rather from luminous sources into our eyes. reflective surfaces + the camera obscura
roger bacon
understood the principle of the rainbow
rené descartes
"And so something which I thought I was seeing with my eyes is in fact grasped solely by the faculty of judgment which is in my mind"
descartes used an ox's eye to determine that we infact see an upside down image of the world
cogito ergo sum (English: "I think, therefore I am")
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