The famous physicist known for his work with electromagnetism is James Clerk Maxwell. His formulation of the four fundamental equations of electromagnetism, known as Maxwell's equations, revolutionized our understanding of electric and magnetic fields and how they interact. These equations not only unified electricity and magnetism but also paved the way for modern physics, influencing the development of technologies such as radio, television, and satellite communications. Maxwell's contributions extend beyond electromagnetism to the fields of thermodynamics, kinetic theory, and statistical mechanics, solidifying his legacy as one of the most influential physicists in history.