Isaac Newton

Optice · 1706
First Latin edition

The Question

What is light?


Grimaldi had shown that light behaved in ways that geometrical optics could not fully explain. Newton pursued a more fundamental question: what was light itself?

Through experiments with prisms, colour, reflection and refraction, Opticks transformed the investigation of light. Its conclusions would dominate eighteenth-century optics and provide the starting point for debates that eventually led to wave theory, electromagnetism and quantum physics.