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604 pages, Hardcover
First published July 14, 2015
‘Electrons are described by space-filling fields—their wave functions—which prefer to vary smoothly and gently. They settle into specific standing wave patterns, or “orbitals,” that find an optimal compromise between the attraction of nuclei and their natural wanderlust. I like to imagine electrons explaining themselves to nuclei this way:
“I find you attractive, but I need my space.”’
‘—Salvador Dalí used dodecahedral symbolism to express a cosmic connection that might otherwise be hard to put on canvas. We’ve also found a dodecahedron lurking within every one of the infinite variety of buckminsterfullerenes, where its twelve pentagons serve as enablers, allowing the hexagons of graphene to close up into a surface—The dodecahedron is a thing of beauty, and by now it’s become a familiar friend.’
‘To me, Caravaggio’s rendering conveys two profound messages that go beyond the words of the gospel’s text—Those who believe without seeing are blessed with the joy of certainty. But it is a fragile certainty, and a hollow joy—Those whose faith is not passive, but engages reality, will receive a second, more fulfilling blessing in the harmony of belief and experience. Blessed are those who believe what they see.’
‘Supersymmetry was (and is) a beautiful mathematical theory. The problem with applying supersymmetry is that it is too good for this world. It predicts new particles—lots of them. We have not seen, so far, the particles it predicts. We do not see, for example, particles with the same charge and mass as electrons, yet are bosons instead of fermions.’
‘Spontaneous symmetry breaking is a strategy for having our supersymmetric cake and eating it too. If we are successful, we can apply beautiful (supersymmetric) equations to describe a less beautiful (asymmetric—or should we say subsupersymmetric?) reality. Specifically, when an electron steps into the quantum dimension, its mass will change—At the frontiers of ignorance, applications of spontaneous symmetry breaking involve creative guesswork. You must guess a symmetry that isn’t visible in the world, put it into your equations, and show that the world—or, more realistically, some aspect of the world you’re trying to explain—pops out of its stable solutions.’
‘In beauty we trust, when making our theories, but their “cash value” depends on other factors. Truth is highly desirable, but it is not the only, or even the most important, criterion. Newton’s mechanics (centred on conservation of mass) and his theory of colours (centred on conservation of spectral types), for example, are not strictly true, yet they are hugely valuable theories. Fertility—a theory’s ability to predict new phenomena, and give us power over Nature—is also a big part of the equation.
Trust in beauty has often, in the past, paid off. Newton’s theory of gravity was challenged by the orbit of Uranus, which did not obey its predictions. Urbain Le Verrier, and also John Couch Adams, trusting in the beauty of the theory, were led to propose the existence of a new planet, not yet observed, whose influence might be responsible. Their calculations told astronomers where to look, and led to the discovery of Neptune.
Maxwell’s great synthesis, as we’ve seen, predicted new colours of light, invisible to our eyes, but also not yet observed. Trusting in the beauty of the theory, Hertz both produced and observed radio waves. In more recent times, Paul Dirac predicted, through a strange and beautiful equation, the existence of antiparticles, which had not yet been observed, but soon thereafter were. The Core, anchored in symmetry, gave us colour gluons, W and Z particles, the Higgs particle, the charmed quark, and the particles of the third family all as predictions prior to their observation.
But there have been failures too. Plato’s theory of atoms and Kepler’s model of the Solar System were beautiful theories that, as descriptions of Nature, utterly failed. Another was Kelvin’s theory of atoms, which proposed that they are knots of activity in the ether. (Knots come in different forms, and they are not easily undone, so they have, it might seem, the right stuff to make atoms.)
Those “failures” were not without fruit: Plato’s theory inspired deeper study of geometry and symmetry, Kepler’s model inspired his great career in astronomy, and Kelvin’s model inspired Peter Tait to develop the theory of mathematical knots, which remains a vibrant subject today—but as theories of the physical world they are hopelessly wrong.’
A Beautiful Question. A history-of-science book with the subtitle “Finding Nature’s Deep Design” by the Nobel laureate theoretical physicist Frank Wilczek. Not only depicting a short history of Physics since the preliminary ideas from the ancient Greeks until the recent quantum researches, Wilczek also transforms this exciting story into a meditation by questioning the idea of beauty as its motive and guiding principle.
“Does the world embody beautiful ideas?” Do the laws of nature have beautiful properties which they should not necessarily have? Embodying concepts in physical objects is what art does, so the question also goes: “Is the world a work of art?” And the book’s answer is: Yes, for sure. Fascinatingly, the beauty in the physical laws is not only something found after the exploration of those laws but also is a persuasive guide in exploring more of them. Following the beauty is a fruitful source for scientific discoveries. “If they were not beautiful, we would not have found them.”¹
The beauty in Nature’s laws is a particular kind and has a distinctive style. It has been highly prized for its own sake and intuitively associated with the divine. (p 223) Its style has been pursued through the ages to comprehend and create order, beauty, and perfection. (p 165) It’s basically the geometric and mathematical symmetry. Symmetry, keenly rooted in the physical laws, determines structure, emerges as economical, and implies conservation laws. (p 276, 49, 281) Putting them all together, as Richard Feynman once said, “You can recognize truth by its beauty and simplicity.”
John Polkinghorne, where he talks about the quantum world which is full of astonishing surprises, says “The instinctive question that a scientist ought to ask about a proposed account of some aspect of reality, whether within science or beyond it, is not ‘Is it reasonable?’, as if we felt we knew beforehand what form reason was bound to take. Rather, the proper question is ‘What makes you think this might be the case?’ The latter is a much more open question, not foreclosing the possibility of radical surprise but insisting that there should be evidential backing for what is being asserted.”² When we ask the proper question, this book offers an inspirational idea.
Platonic Solids. The only possible five polyhedra.
In Pursuit of Beautiful Ideas
The quest in the story begins with Pythagoras in the 6th century B.C. where he discovers the theorem on right triangles, and also discovers a relationship between the musical harmony and the numerical properties of instruments’ strings. These discoveries put everything on the plate for Pythagoreans to establish a mystic worldview connecting Mind, Matter, and Beauty. The inspired guesswork gives birth to the idea that all things are numbers, and numbers underpin harmony. (p 30)
Plato’s intuition leads the way to escape the cave of the imperfect and shadowy projections and find the beauty of the perfect Ideals that inspired the Artisan (Demiurge). The only five Platonic solids having the beauty of symmetry give form to the building blocks of four basic elements and the shape of the Universe. Not helping much with this notoriously inaccurate scientific model, Plato influences scientific works for ages with his insistence on the beautiful Idea(l)s. The symmetry, other than being a guiding principle for many beauty pursuers such as philosophers and scientists, will stage a great comeback later on, especially with Quantum Theory.
More than a millennium later, the standards of this ambitious journey having a bird’s-eye view get raised by Isaac Newton’s method, demanding precision, equations, and intricate descriptions. Mentioning the great scientist’s lifelong interests in biblical studies and alchemy, too, the book shines its beautiful question again by querying the connection between Analysis and Synthesis of the world. (p 86) Static, geometric, and celestial perception of the world is reconciled with Earth and analyzed into dynamical equations and laws of change by Newton’s works on light, motion, and mechanics. Change, as a systemic law of dynamical beauty in space-time, opens a whole new level for scientific discoveries. Although his method is also called reductionism for its atomizing approach, Newton never sees the world as something no more than basic rules and never puts aside the synthesis of its overall beauty, thinking about the Prime Mover and the initial conditions of these beautiful equations.
Following the works on forces and light traveling in suspiciously void space, James Clerk Maxwell takes steps forward in Michael Faraday’s preliminary studies of the space-filling medium and levels up our comprehension with his discoveries and equations of the fluid-like fields, electricity and magnetism. The dancing pair of these fields not only tells much more about the nature of light but also shows that visible light is just a small portion of the large spectrum of the waves. Reduction of the light into electromagnetism becomes a fruitful revelation for understanding the limits and the mechanism of our visual perception and what is beyond. Beautifully, the formulations of the laws working in this unlocked world have the beauty of algebraic symmetry which has been a credible pathfinder in physics.
Even after this many of elaborate formulas of the physical laws, unconventional but beautiful ideas are immensely helpful to explore Nature’s deep design. Here enters Quantum Mechanics, which made one of those great physicists say that “the universe is not only stranger than we thought, it is stranger than we can think”. (attributed to different people) Albert Einstein and Niels Bohr propose ‘outrageous hypotheses’ of photons, stationary states, and quantum jumps, which will find their explanations later. With the two relativity theories, Einstein purely elevates Galilean symmetry and beauty into creative and primary principle. (p 200) From the exuberant world of chemistry emerging from the small set of ingredients, electrons and atomic nuclei, Wilczek casts a glance at this symmetric beauty in allotropes of carbon atoms.
Towards the end, Wilczek dives deeper into the subatomic world and ‘uncovers, in a real sense, the beautiful thing that the physical world is — and then, a still more beautiful thing it might be.’ (p 226) Talking about the remaining two of the four basic forces of Nature, he pursues the local symmetry in strong and weak interactions. Although the beauty is somehow ‘strange, deeply hidden and taking patience to grasp’ this time, Wilczek synthesizes the yin-yang-like ‘complementarity and unified duality’ of the Core to answer the beautiful question.
Beauty in Pursuing Beauty
Symmetry caught thinkers’ eyes long ago and has been considered as one of the central concepts regarding the ideas of order, harmony, and perfection since then. Geometric symmetry has been discerned in the physical world and engraved into art and architecture. With the formulations of the physical laws appeared its mathematical aspect. The symmetries of Nature’s laws in space-time have also become closely related to how the structures of objects are determined, how the abundance of effects is produced, and how the conversation laws last. Simply defining it as “change without change” (p 74, 137), Wilczek is using symmetry to describe the four fundamental forces in the Core Theory (the Standard Model): gravity, electromagnetism, and the strong and weak forces. Despite some not-so-beautiful characteristics of the subatomic realm that are not fully revealed yet, Wilczek’s definitive affirmative answer to the beautiful question shows that beauty can be a greatly promising guide to inspired guesswork to explore a deeper unity in Nature.
“Not all beautiful ideas about deep reality are true. […] Nor are all the truths of deep reality are beautiful.” (p 321) Nonetheless, the laws of nature certainly have a distinctive style of beauty which proved itself as a favorable guiding principle in this journey. It should be studied and experienced to suggest fruitful directions to follow up with more careful investigation. (p 61, 105) Many times, much more came out of the beautiful mathematical formulae than was put into them. (p 134) Even when they are not strictly correct, their fertility -a theory’s ability to predict new phenomena, and give us power over Nature (p 318)- has a big role in the play. They are beautiful when “they are wonderfully symmetric and wonderfully productive. And the beauty of the laws has lately become more important than ever to scientific progress.”¹
The book has a nice and short history of physics with a manageable amount of technical details. What makes it a beautiful book is that it doesn’t just provide historical data; it also interprets it from a philosophical perspective.
¹ Wilczek, F. (2015). Why Is Physics Beautiful? Project Syndicate.
² Polkinghorne, J. (2002). Quantum Theory: A Very Short Introduction Oxford University Press. (Page 87)
The Book: Wilczek, F. (2015). A Beautiful Question: Finding Nature's Deep Design Penguin Press.
Of “A Beautiful Question” — A Beautiful Question in the journey of Science & Philosophy History. Pursuit of Beauty in the laws of Nature. Originally written on October 27, 2023.