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| | CATHOLIC ENCYCLOPEDIA: History of Physics |
 | | About 1270 Witelo (or Witek; the Thuringopolonus), composed an exhaustive ten-volume treatise on optics, which remained a classic until the time of Kepler, who wrote a commentary on it. |
 | | Albertus Magnus, Roger Bacon, John Peckham, and Witelo were deeply interested in the theory of the rainbow, and, like the ancient meteorologists, they all took the rainbow to be the image of the sun reflected in a sort of a concave mirror formed by a cloud resolved into rain. |
 | | Like the work of Thierry of Freiberg on the rainbow, the "Epistola de magnete" by Maricourt was a model of the art of logical sequence between experiment and deduction. |
| www.newadvent.org /cathen/12047a.htm (14270 words) |
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