 Hermann von Helmholtz

Hermann von Helmholtz (1821–1894) was a German physician, physicist, and philosopher known for his significant contributions to several fields, including physiology, thermodynamics, optics, and the theory of energy conservation. He is particularly renowned for his work in understanding the principles of energy conservation, encapsulated in the formulation of the law of conservation of energy, which states that energy cannot be created or destroyed, only transformed from one form to another.