Lord Kelvin (William Thomson)

William Thomson, known as Lord Kelvin, was a 19th-century British physicist and engineer renowned for his work on thermodynamics and the measurement of temperature. He helped develop the absolute temperature scale, now called the Kelvin scale, which starts at absolute zero—the point where particles have minimal thermal motion. Kelvin also contributed to understanding heat transfer, electrical phenomena, and the Earth's age. His insights laid foundational principles for modern physics and engineering, making him one of the most influential scientists of his time.