How Thomas Young's 1807 lectures transformed the Latin concept of vis viva into the modern …

How Young's 1803 Bakerian Lecture formalised the Principle of Interference — explaining Newton's rings, soap-film …

How the laws of definite and multiple proportions led John Dalton to propose that matter …

How a narrow slit and a glass prism revealed mysterious dark gaps in sunlight — …

The single experiment that proved light is a wave in 1801 — and became the …

How silver chloride paper and a glass prism revealed invisible radiation beyond violet — completing …

How a prism, three blackened thermometers, and careful solar observation revealed an invisible world of …