Tag Archives: René Descartes

11th century Arab-Muslim optical scientist laid groundwork for modern-day physics

An April 15, 2024 news item on phys.org announces research into how an Arab scientist’s studies into optics established the basis for modern day physics,

Scientists from the University of Sharjah [United Arab Emirates] and the Warburg Institute [University of London, UK] are poring over the writings of an 11th-century Arab-Muslim polymath to demonstrate their impact on the development of optical sciences and how they have fundamentally transformed the history of physics from the Middle Ages up to modern times in Europe.

Caption: Ibn al-Haytham (“Alhasen”) on the left pedestal of reason [while Galileo is on the right pedestal of the senses] as shown on the frontispiece of the Selenographia (Science of the Moon; 1647) of Johannes HeveliusIbn al-Haytham (“Alhasen”) on the left pedestal of reason [while Galileo is on the right pedestal of the senses] as shown on the frontispiece of the Selenographia (Science of the Moon; 1647) of Johannes Hevelius Credit: Public domain provided by the author

A May 6, 2024 University of Sharjah press release on EurekAlert, which originated the news item, delves further into the topic, Note 1: Why there’s such a large discrepancy in the publication dates for the press release is a mystery to me; Note 2: Links have been removed,

Their research focuses on the legacy of al-Ḥasan Ibn al-Haytham known in Latin as “Alhazen” and particularly his most influential work titled Book of Optics, reputed in Arabic as Kitab al-Manazir and first circulated in Europe via its Latin translation dubbed ‘Perspectiva’. Ibn al-Haytham was born in the southern Iraqi city of Basra in 965 during the Abbasid Caliphate.

The divisions IV-V of this authoritative book have been recently translated into English from Arabic and published by the Warburg Institute under the title “The Optics of Ibn al-Haytham, Books IV–V: On Reflection and Images Seen by Reflection”. Having already rendered divisions I-III into English, the Warburg Institute is bringing together a wide-ranging network of scientists “for a collaborative humanities-science investigation of [Ibn] al-Haytham and the questions his work provokes.“

The role of Alhazen [Ibn al-Haytham] in these processes is simultaneously well-known, but limited; only half of his scientific works have English translation and a quarter are not yet edited.”

Introducing the new translation, the Warburg Institute describes Ibn al-Haytham as “perhaps the greatest mathematician and physicist of the medieval Arabic/Islamic world. His reputation is based not only on the vast amount of material he was able to process, but also on his rigorous scientific methodology.

“He (Ibn al-Haytham) deals with both the mathematics of rays of light and the physical aspects of the eye in seven comprehensive books. His reinstatement of the entire science of optics sets the scene for the whole of the subsequent development of the subject … influencing figures such as William of Ockham, [Johannes] Kepler, [René] Descartes, and Christaan Huygens.”

Professor Nader El-Bizri of Sharjah University’s College of Arts, Humanities, and Social Sciences has just published an academic review of the Warburg Institute’s translation of Ibn al-Haytham. The article, printed in the International Journal of the Classical Tradition, highlights the strong influence the Arab-Muslim optical scientist has exerted over the ages up to the present day.

Ibn al-Haytham’s Book of Optics, Prof. El-Bizri writes, “constituted a monumental foundational opus in the history of science and the visual arts from the Middle Ages to the early modern period in the European milieu and the Islamicate context … The reception of Ibn al-Haytham’s Optics in the European milieu took place from the High Middle Ages via Gerard of Cremona’s Toledo circle in terms of its Latinate translations, and subsequent influence on Franciscan, Dominican, and Jesuit opticians across Europe.“

It influenced François d’Aguilon’s Opticorum libri sex within the Antwerp Jesuit mathematical school and had a direct impact on Johannes Hevelius’s Selenographia. The Optics was also consulted by Girard Desargues, René Descartes, Johannes Kepler and Christaan Huygens.”

Prof. El-Bizri works closely with the Warburg Institute assisting its attempts to reintroduce Ibn al-Haytham to the west. “A remarkable thinker, not only did Ibn al-Haytham revolutionize optical thought by mathematising its study, [but] his thinking also went on to have similar revolutionary effects in medieval Europe.”

The Warburg Institute is investing in rendering the writings of Ibn al-Haytham on optics into English, which Prof. El-Bizri describes as “voluminous”. “Ibn al-Haytham’s Book of Optics indicates with evidence the impact of Arabic sciences and philosophy on the history of science and the architectural and visual arts in Europe, as well as demonstrating how science and the arts influence each other in the manner the studies of optics in their mathematized physics inspired the invention of projective geometric constructions of perspective as a novel Renaissance method of painting and architectural design.”

Prof. El-Bizri adds “The impact of this book is fundamental not only in the history of science from the High Middle Ages till the early-modern period in Europe, but it was also foundational for architecture and the visual arts in the Italian Renaissance and up till the late Baroque era. Moreover, it has further significance in modern conceptions of the mathematization of physics, the reliance on experimentation in science, and the philosophical analysis of perception.”

Asked about the importance of translating Ibn al-Haytham into English despite the lapse of nearly 1000 years, Prof. El-Bizri says the Arab-Muslim scientist’s theories and methodologies, specifically those dealing with optics are still considered “seminal” in the literature. Ibn al-Haytham has had a “foundational impact on the history of science and the arts in Europe.”

The influence of Ibn al-Haytham’s writings in the European milieu, according to Prof. El-Bizri, cannot be overlooked. The Arab-Muslim scientist had “a notable effect on Biagio Pelacani da Parma’s Questiones super perspectiva communi, Leon Battista Alberti’s De pictura, Lorenzo Ghiberti’s Commentarii, culminating in the first printed Latin version in the publication of Friedrich Risner’s Opticae thesaurus in the sixteenth century.“

Then, in the seventeenth century, it influenced François d’Aguilon’s Opticorum libri sex within the Antwerp Jesuit mathematical school and had a direct impact on Johannes Hevelius’s Selenographia.”.

In the Book of Optics, notes Prof. El-Bizri, Ibn al-Haytham establishes an “inventive and precise scientific experimental method (al-iʿtibār al-muḥarrar) with its controlled verificative repeated testing, as framed by isomorphic compositions between physics and mathematics.”

He adds that Ibn al-Haytham in his Optics “aims at elucidating the nature of visual perception through studies on the anatomy and physiology of the eyes, the optic nerves and the frontal part of the brain, along with cognitive psychology and the analysis of psychosomatic ocular motor kinaesthetic acts”

Here’s a link to and a citation for the paper, Note: This is one of the more unusual citation I have hrere,

The Optics of Ibn al-Haytham, Books IV–V: On Reflection and Image by N. El-Bizri. Seen by Reflection, translated from the Arabic by Abdelhamid I. Sabra and prepared for publication by Jan P. Hogendijk (Warburg Institute Studies and Texts, 8), London: University of London Press in association with the Warburg Institute, 2023, pp. xiv+343, ISBN 978-1908590589, £90. Int class trad 31, 116–119 (2024). https://doi.org/10.1007/s12138-024-00654-4 Published: 20 February 2024 Issue Date: March 2024

This paper is behind a paywall.

I was a little curious about the Warburg Institute and found out more on their About Us webpage,

The Warburg Institute is one of the world’s leading centres for the study of art and culture. Its collections, courses and programmes are dedicated to the study of global cultural history and the role of images in society. Founded in Hamburg at the turn of the twentieth century by historian Aby Warburg (1866-1929), the Institute was established to trace the roots of the Renaissance in ancient civilisations and ended up changing the way we see the world around us.

The Warburg Institute owes its mission—and its very existence—to the open movement of people, collections and ideas. Sent into exile when the Nazis came to power, the Institute was transferred to England in 1933 and became part of the University of London in 1944. It has served, during a turbulent century, as a creative crucible for scholars, curators, artists and all those whose work sits outside traditional academic structures.

The Warburg’s unique Library, Archive and Photographic Collection form a holistic, associative engine for exploring the histories of the arts and sciences—linking the textual and the visual, the intellectual and the social, the scientific and the magical. Following an extensive renovation of the Institute’s building in Bloomsbury, new spaces for exhibitions and events have restored the Institute’s original emphasis on discovery, display and debate and are bringing its holdings and programmes to new audiences.

Building on Aby Warburg’s belief that the memory of the past activates the present, the Warburg examines the movement of culture across barriers – of time, space and discipline -to inspire, inform and connect.

There you have it.

Are they just computer games or are we in a race with technology?

This story poses some interesting questions that touch on the uneasiness being felt as computers get ‘smarter’. From an April 13, 2016 news item on ScienceDaily,

The saying of philosopher René Descartes of what makes humans unique is beginning to sound hollow. ‘I think — therefore soon I am obsolete’ seems more appropriate. When a computer routinely beats us at chess and we can barely navigate without the help of a GPS, have we outlived our place in the world? Not quite. Welcome to the front line of research in cognitive skills, quantum computers and gaming.

Today there is an on-going battle between man and machine. While genuine machine consciousness is still years into the future, we are beginning to see computers make choices that previously demanded a human’s input. Recently, the world held its breath as Google’s algorithm AlphaGo beat a professional player in the game Go–an achievement demonstrating the explosive speed of development in machine capabilities.

An April 13, 2016 Aarhus University press release (also on EurekAlert) by Rasmus Rørbæk, which originated the news item, further develops the point,

But we are not beaten yet — human skills are still superior in some areas. This is one of the conclusions of a recent study by Danish physicist Jacob Sherson, published in the journal Nature.

“It may sound dramatic, but we are currently in a race with technology — and steadily being overtaken in many areas. Features that used to be uniquely human are fully captured by contemporary algorithms. Our results are here to demonstrate that there is still a difference between the abilities of a man and a machine,” explains Jacob Sherson.

At the interface between quantum physics and computer games, Sherson and his research group at Aarhus University have identified one of the abilities that still makes us unique compared to a computer’s enormous processing power: our skill in approaching problems heuristically and solving them intuitively. The discovery was made at the AU Ideas Centre CODER, where an interdisciplinary team of researchers work to transfer some human traits to the way computer algorithms work. ?

Quantum physics holds the promise of immense technological advances in areas ranging from computing to high-precision measurements. However, the problems that need to be solved to get there are so complex that even the most powerful supercomputers struggle with them. This is where the core idea behind CODER–combining the processing power of computers with human ingenuity — becomes clear. ?

Our common intuition

Like Columbus in QuantumLand, the CODER research group mapped out how the human brain is able to make decisions based on intuition and accumulated experience. This is done using the online game “Quantum Moves.” Over 10,000 people have played the game that allows everyone contribute to basic research in quantum physics.

“The map we created gives us insight into the strategies formed by the human brain. We behave intuitively when we need to solve an unknown problem, whereas for a computer this is incomprehensible. A computer churns through enormous amounts of information, but we can choose not to do this by basing our decision on experience or intuition. It is these intuitive insights that we discovered by analysing the Quantum Moves player solutions,” explains Jacob Sherson. ? [sic]

The laws of quantum physics dictate an upper speed limit for data manipulation, which in turn sets the ultimate limit to the processing power of quantum computers — the Quantum Speed ??Limit. Until now a computer algorithm has been used to identify this limit. It turns out that with human input researchers can find much better solutions than the algorithm.

“The players solve a very complex problem by creating simple strategies. Where a computer goes through all available options, players automatically search for a solution that intuitively feels right. Through our analysis we found that there are common features in the players’ solutions, providing a glimpse into the shared intuition of humanity. If we can teach computers to recognise these good solutions, calculations will be much faster. In a sense we are downloading our common intuition to the computer” says Jacob Sherson.

And it works. The group has shown that we can break the Quantum Speed Limit by combining the cerebral cortex and computer chips. This is the new powerful tool in the development of quantum computers and other quantum technologies.

After the buildup, the press release focuses on citizen science and computer games,

Science is often perceived as something distant and exclusive, conducted behind closed doors. To enter you have to go through years of education, and preferably have a doctorate or two. Now a completely different reality is materialising.? [sic]

In recent years, a new phenomenon has appeared–citizen science breaks down the walls of the laboratory and invites in everyone who wants to contribute. The team at Aarhus University uses games to engage people in voluntary science research. Every week people around the world spend 3 billion hours playing games. Games are entering almost all areas of our daily life and have the potential to become an invaluable resource for science.

“Who needs a supercomputer if we can access even a small fraction of this computing power? By turning science into games, anyone can do research in quantum physics. We have shown that games break down the barriers between quantum physicists and people of all backgrounds, providing phenomenal insights into state-of-the-art research. Our project combines the best of both worlds and helps challenge established paradigms in computational research,” explains Jacob Sherson.

The difference between the machine and us, figuratively speaking, is that we intuitively reach for the needle in a haystack without knowing exactly where it is. We ‘guess’ based on experience and thereby skip a whole series of bad options. For Quantum Moves, intuitive human actions have been shown to be compatible with the best computer solutions. In the future it will be exciting to explore many other problems with the aid of human intuition.

“We are at the borderline of what we as humans can understand when faced with the problems of quantum physics. With the problem underlying Quantum Moves we give the computer every chance to beat us. Yet, over and over again we see that players are more efficient than machines at solving the problem. While Hollywood blockbusters on artificial intelligence are starting to seem increasingly realistic, our results demonstrate that the comparison between man and machine still sometimes favours us. We are very far from computers with human-type cognition,” says Jacob Sherson and continues:

“Our work is first and foremost a big step towards the understanding of quantum physical challenges. We do not know if this can be transferred to other challenging problems, but it is definitely something that we will work hard to resolve in the coming years.”

Here’s a link to and a citation for the paper,

Exploring the quantum speed limit with computer games by Jens Jakob W. H. Sørensen, Mads Kock Pedersen, Michael Munch, Pinja Haikka, Jesper Halkjær Jensen, Tilo Planke, Morten Ginnerup Andreasen, Miroslav Gajdacz, Klaus Mølmer, Andreas Lieberoth, & Jacob F. Sherson. Nature 532, 210–213  (14 April 2016) doi:10.1038/nature17620 Published online 13 April 2016

This paper is behind a paywall.