Open Daily: 10am - 10pm | Alley door pickup 10am - 7pm 3038 Hennepin Ave Minneapolis, MN
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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
The Algebra of Shadows: Rules, Interactions, and the Hidden Information Carried by Darkness

The Algebra of Shadows: Rules, Interactions, and the Hidden Information Carried by Darkness

Winterfield-Olu, Pavla

Paperback

Physics

ISBN13: 9798172077463
Publisher: Independently Published
Published: Sep 5 2026
Pages: 252
Weight: 0.75
Height: 0.53 Width: 6.00 Depth: 9.00
Language: English
Why did a librarian in ancient Alexandria only need a stick and its shadow to calculate the size of the entire Earth? Why did a seventeenth century Danish astronomer discover the speed of light not by watching a beam of light, but by timing the exact moment a moon vanished into another planet's shadow? And why, in 2019, did the most anticipated astronomical photograph in a generation show scientists something they could never actually see?

In this gripping, rigorously researched work of popular science, physicist Dr. Pavla Winterfield-Olu reveals that shadow is not an absence of information but a precise, rule governed phenomenon, one that has repeatedly handed scientists knowledge no direct measurement of light could provide. From Eratosthenes and the speed of light to solar eclipses, the sundial's hidden mathematics, the birth of photography, Caravaggio's dramatic darkness, Plato's cave, the biology of how living things read the dark, engineered materials blacker than anything in nature, and the first ever photograph of a black hole's shadow, this book traces a single, continuous thread of discovery spanning two thousand years.

Blending real science, real history, and vivid, page turning storytelling, The Algebra of Shadows will change the way you see the darkness falling across your own floor, forever.

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