Scientists / Physics
ジェームズ・クラーク・マクスウェル
GB 1831-06-13 ~ 1879-11-05
Nineteenth-century Scottish theoretical physicist
Unified electricity, magnetism, and light in four equations, achieving physics' second great unification
Einstein called his work the most profound since Newton
Scottish theoretical physicist born in 1831 who unified electricity, magnetism, and light in four equations. Maxwell's equations are considered the second great unification in physics, after Newton's mechanics.
What You Can Learn
Maxwell's unification shows the power of synthesis: combining disparate phenomena under a single framework reveals deeper truth, a principle applicable to data integration and platform strategies in business. His prediction of electromagnetic waves, confirmed only after his death, illustrates the value of theoretical investment that may take years to pay off. And the Cavendish Laboratory he founded demonstrates how institutional design shapes long-term scientific output.
Words That Resonate
The only laws of matter are those which our minds must fabricate and the only laws of mind are fabricated for it by matter.
Thoroughly conscious ignorance is the prelude to every real advance in science.
What is done by what is called myself is, I feel, done by something greater than myself in me.
Life & Legacy
James Clerk Maxwell achieved the second great unification in physics. By consolidating Faraday's experimental discoveries into four elegant equations, he showed that electricity, magnetism, and light are manifestations of a single electromagnetic field, and he predicted electromagnetic waves decades before Hertz detected them.
Born in 1831 in Edinburgh to a landed family, he showed precocious scientific ability, publishing a paper on oval curves at fourteen. He studied at Edinburgh and Cambridge, where he became a fellow of Trinity College.
His work on electromagnetism, published in stages between 1861 and 1865, culminated in A Dynamical Theory of the Electromagnetic Field. The four Maxwell equations describe how electric and magnetic fields are generated and altered by charges and currents, and how they propagate as waves at the speed of light. This identification of light as an electromagnetic wave was one of the most profound insights in the history of physics.
Maxwell also made foundational contributions to statistical mechanics, developing the Maxwell-Boltzmann distribution for the velocities of gas molecules, and to color theory, producing the first color photograph in 1861.
He founded the Cavendish Laboratory at Cambridge in 1874 and served as its first director, establishing the institution that would host many of the twentieth century's major physics discoveries.
Maxwell died of abdominal cancer in 1879 at age forty-eight. Einstein said that Maxwell's work was "the most profound and the most fruitful that physics has experienced since the time of Newton."
Expert Perspective
Among scientists, Maxwell ranks alongside Newton and Einstein. His equations unified electricity, magnetism, and light, and his prediction of electromagnetic waves opened the age of radio, television, and wireless communication. His contributions to statistical mechanics and color theory further demonstrate his range. Einstein credited Maxwell with the most transformative physics since Newton.