David Brewster

Born in Jedburgh, Scotland, in 1781, David Brewster became one of the best-known scientific figures of the 19th century. Although trained for the ministry, he devoted much of his life to science and writing, especially in optics, where his research led to Brewster's law and helped shape the study of polarization and light.

He had a gift for turning complex ideas into lively reading. Alongside technical research, he wrote widely for general audiences and became closely associated with the kaleidoscope, an invention that delighted the public while also showing his serious interest in visual perception and scientific instruments. His work also touched photography, microscopy, and the history of science.

Brewster was deeply involved in intellectual life in Scotland and beyond, serving in major academic roles including the principalships of the University of St Andrews and later the University of Edinburgh. He died in 1868, remembered as a scientist who combined original research with an unusual talent for explaining discovery in an inviting way.