Lord Kelvin

Lord Kelvin is famous for developing the absolute temperature scale, known today as the Kelvin scale, which begins at absolute zero. Unlike Celsius or Fahrenheit, the Kelvin scale does not use degrees and is the standard unit of thermodynamic temperature in the physical sciences.

He played a crucial role in formulating the first and second laws of thermodynamics, which govern the relationships between heat, work, and energy. His work established the foundational understanding that heat naturally flows from hot to cold and that energy cannot be created or destroyed.

Lord Kelvin was born William Thomson, but he was later elevated to the peerage and took his title from the River Kelvin that flowed past his university. He spent much of his illustrious career as a professor of natural philosophy at the University of Glasgow.

Kelvin applied his deep understanding of physics to solve critical electrical issues during the laying of the first successful transatlantic telegraph cable in 1858. He invented a sensitive mirror galvanometer that could detect the incredibly faint electrical signals passing through the long underwater copper cable.