James Clerk Maxwell

Maxwell unified electricity, magnetism, and light into a single theoretical framework with his four Maxwell equations, published in 1865—one of the greatest intellectual achievements in physics. His work predicted the existence of electromagnetic waves traveling at the speed of light, which Hertz confirmed in 1888, enabling radio, television, and wireless communication. His electromagnetic theory outperforms #2 Einstein's relativity in direct technological impact, giving birth to entire industries. Maxwell’s equations reduced physics to 20 elegant equations, a leap that inspired 20th-century field theory.