optics was first figured out by a Muslim? Al Hazzen in the 10th century. He was thrown into prison becuz he didn't or couldn't figure out a way to stop the Nile flooding. The Calif (Kalif) at the time was pissed off and thru him in the slammer; where he figured out that light travels in rays to our eyes.
apparently the Calif at the time couldn't stand not being able to control everything, so he got ahold of Al Hazzen and roped him into the attempt to stop the flooding of the Nile. Al Hazzen fained maddness but to no avail, and was thrown in gaol.
Was ok tho, becuz, when the Calif died he was freed and wrote down the optics stuff he figured out.
Ptolemy (Claudius Ptolemaeus) (85 - 165AD) propounded the geocentric system which prevailed for the next 1400 years. Only one of the five volumes he wrote on optics has survived. He dealt with refraction and obtained the small angle approximation to Snell’s law, concluding that the ratio of the angles of incident and refracted light were constant.. He also discussed the refraction of starlight by the atmosphere...
58mm 28pc lens filter
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