Opticks – Isaac Newton

"Light is a confused aggregate of Rays of all sorts of Colours."

Isaac Newton summarizes his experiments with light and color, famously using a prism to demonstrate that white light is composed of a spectrum of colors. Unlike the geometric deductions of the Principia, Opticks relies on careful experimentation and induction, exploring the nature of reflection, refraction, and the wave-particle duality of light.

This treatise is a landmark in the history of experimental science. It not only established the modern understanding of optics but also championed the scientific method of hypothesis and experiment. It remains a fascinating glimpse into the mind of one of history's greatest geniuses.