A Critical Edition of Ibn al-Haytham’s On the Shape of the by Dominique Raynaud PDF

By Dominique Raynaud

ISBN-10: 3319479903

ISBN-13: 9783319479903

ISBN-10: 3319479911

ISBN-13: 9783319479910

This publication presents the 1st serious version of Ibn al-Haytham’s On the form of the Eclipse with English translation and statement, which documents the 1st clinical research of the digital camera obscura. On the form of the Eclipse contains pioneering learn at the stipulations of formation of the picture, in a time deemed to be devoted to aniconism. It additionally presents an early try and merge the 2 branches of historical optics—the conception of sunshine and conception of vision.

What possibly so much strongly characterizes this treatiseis the shut interplay of a geometrical research of sunshine and experimental reasoning. Ibn al-Haytham carried out his experiments in a scientific approach via various all which may be replaced: the form and measurement of the aperture, the focal size of the digicam obscura, the gap and form of the celestial our bodies. this manner, he accomplished an intensive realizing. This paintings represents a decisive step in either the heritage of optics and the applying of the experimental technique that was once simply as effective in medieval Islam as today.

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Extra resources for A Critical Edition of Ibn al-Haytham’s On the Shape of the Eclipse: The First Experimental Study of the Camera Obscura

Sample text

Line FR of arc ŠFH (lines 623). The same word can refer to the “axis” ṢṬF of ¯ the light cone spread from the aperture (lines 130, 139) and, more critically, it can also refer to the “generatrix” SḤT of the same cone (line 135). Here any word-toword translation would fail to make the text clear. In view of this, the word sahm has been translated to “sagitta,” “axis” or “generatrix,” according to the context. Optics. The adjective ‫( اﻟ ـﻬ ـﻼل اﻟ ـﻤ ـﻀ ـﻲء‬al-hilāl al-muḍī’) has many occurrences in Ibn al-Haytham’s text.

10‬‬ 31 On the Shape of the Eclipse a and the moonlight appears on the plane opposite the aperture, its light will always be circular. It will never be like the image L9r even if the two apertures facing the Sun and the Moon are equal, P22r of the sunlight, and if the dis- tance that separates the two planes displaying the light from the two planes of the apertures5 are equal on both occasions. ǀPO And this is true6 in the event the eclipse of the Moon is not a total one and what remains of it is crescent-shaped; its light coming from the aperture is not crescentshaped.

The verbal forms ‫ ﻳـ ـﻜـ ـﻮن‬،‫( ﺗـ ـﻜـ ـﻮن‬yakūn/takawwūn, “he/she is”) and ‫ ﻳـ ـﺨـ ـﺮج‬،‫ﺗـ ـﺨـ ـﺮج‬ (yakhruj/takharruj, “he/she comes out”) are muddled throughout the manuscripts. ‫ رأس ـ‬instead of ‫ﺳﻬﻤـﺎ‬ ‫رأ ـ ـ‬ Affixe pronouns are juxtaposed rather than attached: we read ‫ﻫﻤـﺎ‬ (rāsahumā, “their two apices”). All those peculiarities have been erased, while other spelling variants have been kept as long as the understanding of the text and ease of reading were not at stake. 3. Punctuation None of the manuscripts is puncutated with the use of commas, semicolons and full stops.

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A Critical Edition of Ibn al-Haytham’s On the Shape of the Eclipse: The First Experimental Study of the Camera Obscura by Dominique Raynaud


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