Image:Ibn Sahl manuscript.jpg

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[edit] Description

Description
English: 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. The reproduction is via fair use.
Source

en:Image:Ibn Sahl fig.jpg
Date

14 juli 2005
Author

Ibn Sahl (Abu Sa`d al-`Ala' ibn Sahl) (c. 940-1000)
Permission
(Reusing this image)

see below

[edit] Licensing

Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.

Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.

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File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeDimensionsUserComment
current16:41, 4 January 20081,139×1,471 (168 KB)Thuresson (larger)
16:11, 30 December 2007275×355 (17 KB)Quatrostein ({{Information |Description=Manuscript van Ibn Sahl (10de eeuw) |Source=en.wikipedia.org/wiki/Ibn_Sahl |Date=14 juli 2005 |Author=Unknown |Permission= |other_versions= }} )
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