Michael Faraday

By Lin Yue

Michael Faraday was born in 1791 in Newington, Surrey, the son of a blacksmith, one of ten children in a poor Sandemanian family — and he never attended a university, never learned advanced mathematics, and spoke with a working-class accent all his life. Apprenticed to a bookbinder at fourteen, he read the books he was binding, attended Humphry Davy's public lectures at the Royal Institution, and sent Davy a bound volume of his lecture notes with a plea for work. Davy hired him as a laboratory assistant in 1813. Within a decade the assistant had outshone the master.

In 1821 Faraday made a wire spin continuously around a magnet — the first electric motor, current turned into motion. Then he chased the reverse: if current makes motion, motion should make current. For ten years he tried and failed, until in August 1831 he wound two coils around an iron ring, switched the current in one, and saw the galvanometer on the other flick — electromagnetic induction, discovered in weeks of feverish work that autumn. By October he had built the first dynamo: a copper disc spinning between magnet poles, throwing off a steady current — the ancestor of every generator on every grid. He found the laws that govern it all: the lines of force, the quantitative laws of electrolysis, the rotation of polarized light by magnetism. He thought in pictures, not equations — fields, lines, flows — and Maxwell would later translate the pictures into the equations that bear Maxwell's name.

Faraday refused a knighthood, refused lucrative consulting, and refused — twice — to help the government make poison gas for the Crimean War, on moral grounds. He gave his famous Christmas lectures for children, believing science belonged to everyone. He died in 1867 at Hampton Court, in rooms granted by the Queen. He had no degree and no fortune. He had discovered the principle by which nearly all the world's electricity is still generated: spin a conductor through a magnetic field. Every power station on earth is a monument to the bookbinder's boy. His lack of mathematics became his strength: where others wrote equations, Faraday drew lines of force filling space, a picture of the field that Maxwell — who called him the greatest experimental philosopher — turned into electromagnetic theory. The Royal Institution's Friday Evening Discourses made him the most famous lecturer in London; his Christmas lectures, begun in 1827, still run today. He discovered benzene, invented the Bunsen burner's ancestor, and mapped the magnetism of every element he could get. Offered the presidency of the Royal Society, he declined; offered wealth, he declined faster. The bookbinder's apprentice who taught himself from the books he bound remains the purest example of what experiment, unaided, can do.

Impact on civilization

Electromagnetic induction is the principle behind essentially all electric power generation. Coal, gas, nuclear, hydro, wind — whatever spins the turbine, it is Faraday's 1831 discovery that converts the motion into current: every grid on earth runs on it, two centuries later, with no successor in sight. The electric motor, his 1821 invention, is the mirror image — current into motion — and it drives everything from factory machinery to subway trains to the vibration in a phone. Together, generation and motorization made electricity the universal energy carrier of civilization: light, heat, computation, communication, transport. The depth is total — electricity rewired what civilization is, from the factory floor to the hospital ward to the server farm. Faraday, who could not do calculus, gave the world the physics it runs on; Maxwell formalized it, Edison and Tesla industrialized it, but the discovery was his. His field concept — invisible lines of force filling space — became the foundation of modern physics, from Maxwell's equations to Einstein's relativity. He changed not only what civilization runs on, but how it understands nature.