Clerk Maxwell's Treatise on Electricity and Magnetism

Clerk Maxwell's Treatise on Electricity and Magnetism, published in 1873, unified the study of electric and magnetic phenomena by introducing the concept that both are manifestations of a single force: electromagnetism. He formulated equations—now called Maxwell's equations—that describe how electric and magnetic fields interact and change over time. This work laid the foundation for modern electrical engineering, wireless communication, and our understanding of light as an electromagnetic wave. Overall, it transformed physics by connecting electricity, magnetism, and optics into a comprehensive framework.