This article focuses on a critical presentation of the arguments put forward by Kamal al-Din al-Farisi about the formation of the rainbow. This optical phenomenon was explained simultaneously but independently by two scientists, Kamal al-Din al-Farisi and Theodoric of Freiberg. Surprisingly, their theories of the rainbow were nearly correct in some respects and somewhat similar to our present understanding. This study reveals that Kamal al-Din al-Farisi was well ahead of his time in his assumptions related to most of the above mentioned topic.
Kamal Al-Din Al-Farisi’s Explanation of the Rainbow
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Figure 1. The Tabula Rogeriana, drawn by al-Idrisi for Roger II of Sicily in 1154, one of the most advanced ancient world maps. Modern consolidation, created from the 70 double-page spreads of the original atlas. (Source)
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