한
← All rivers
River of knowledge

The River of Optics and Light

How did ways of seeing light reshape measurement, geometry, and waves?

From al-Haytham to Maxwell — 850 years of mathematizing light.

1021–18654 city-to-city segments

Read the current

What changed between the cities?

  1. 1

    1021–1100

    translation

    CairoToledo

    al-Haytham — Birth of Scientific Optics

    In Cairo, Ibn al-Haytham’s Book of Optics used experiment and mathematics to establish a new theory of vision.

    Kitab al-Manazir
    Place this segment on the map
  2. 2

    1611–1650

    scholars and schools

    ToledoPrague

    Kepler — Telescope Optics

    Kepler published Dioptrice in Prague in 1611, explaining the optics of the Keplerian telescope and building on al-Haytham’s Latin Perspectiva tradition.

    Dioptrice (1611, Prague) and laws of refraction
    Place this segment on the map
  3. 3

    1666–1704

    scholars and schools

    PragueCambridge

    Newton — Spectrum of Light

    Newton’s prism experiments at Cambridge showed that white light is a mixture of colors. Opticks was published in London in 1704.

    Opticks (1704, London)
    Place this segment on the map
  4. 4

    1865–1900

    scholars and schools

    LondonBerlin

    Maxwell — Light as Electromagnetic Wave

    Maxwell presented a mathematical theory of the electromagnetic field at King’s College London in 1865, predicting that light is an electromagnetic wave. Hertz confirmed the prediction experimentally in 1887.

    A Dynamical Theory of the Electromagnetic Field (1865, London) and Maxwell’s equations
    Place this segment on the map

How to read the lines

Each line is an editorial route through problems, texts, and practices. It does not imply one book moving in a straight line, a sole invention, or identical adoption everywhere.