By Dominique Raynaud

This publication offers the 1st severe version of Ibn al-Haytham’s On the form of the Eclipse with English translation and statement, which files the 1st clinical research of the digicam obscura. On the form of the Eclipse comprises pioneering study at the stipulations of formation of the picture, in a time deemed to be dedicated to aniconism. It additionally offers an early try to merge the 2 branches of historic optics—the thought of sunshine and thought of vision.

What possibly such a lot strongly characterizes this treatiseis the shut interplay of a geometrical research of sunshine and experimental reasoning. Ibn al-Haytham performed his experiments in a scientific approach by way of various all which may be replaced: the form and dimension of the aperture, the focal size of the digital camera obscura, the gap and form of the celestial our bodies. this fashion, he accomplished an intensive figuring out. This paintings represents a decisive step in either the heritage of optics and the appliance of the experimental procedure that was once simply as effective in medieval Islam as today.

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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

This e-book presents the 1st severe variation of Ibn al-Haytham’s at the form of the Eclipse with English translation and statement, which documents the 1st clinical research of the digicam obscura. at the form of the Eclipse contains pioneering examine at the stipulations of formation of the picture, in a time deemed to be devoted to aniconism.

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

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Correxit del. delevit marg. in margine lac. lacuna om. omissit post post rep. repetivit scr. p. sine punctis tr. transposuit ? lectio incerta ! sic <> addendum [] omittendum ( parenthesis added around a manuscript text to identify ratio terms ... X X ǁX long pause marked by the sign in MS X in MS X 27 Chapter 2 Arabic Text and Translation © Springer International Publishing AG 2016 D. 1007/978-3-319-47991-0_2 29 F MS Fātiḥ B MS Bodleian P MS Petersburg O MS India Office 1270 L MS India Office 461 F117r O79r P21v B81v L8v In the name of God, the Merciful1 al-Ḥasan ibn al-Ḥasan ibn al-Haytham’s Epistle on the Shape of the Eclipse <1.

The line joining the apex of the cone to the center of the base of the convex surface, which is the axis30 of the convex surface, ends at the center of the Sun. Similarly, the line joining the apex of the cone to the center of the base of the concave surface, which is the axis of the concave surface of the cone, passes through the center of the Moon. ǀPǁOB 30. : “arrow” (‫ﺳﻬـﻢ‬ ‫) ـ‬. This term refers to both the axis and the generatrix of the cone.

If we imagine the intersection of the convex surface of the cone L12v with the concave surface of the cone, this makes a crescent-shaped figure bounded by two arcs of two equal circles. The line joining the apex of the cone to the center of the base of the convex surface, which is the axis30 of the convex surface, ends at the center of the Sun. Similarly, the line joining the apex of the cone to the center of the base of the concave surface, which is the axis of the concave surface of the cone, passes through the center of the Moon.

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