Image: Ibn Sahl manuscript
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Description: Reproduction of a page of Ibn Sahl's manuscript showing his discovery of the law of refraction (from Rashed, 1990). The original (ca. 984) is public domain.
Title: Ibn Sahl manuscript
Credit: en:Image:Ibn Sahl fig.jpg
Author: Ibn Sahl (Abu Sa`d al-`Ala' ibn Sahl) (c. 940-1000)
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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