Kelvin

Kelvin

Kelvin is a unit of measurement for temperature used in the International System of Units (SI). It is named after the British physicist William Thomson, 1st Baron Kelvin (1824–1907), who proposed the need for an absolute thermodynamic temperature scale. The Kelvin scale is defined such that 0 K (absolute zero) corresponds to −273.15°C or −459.67°F, the theoretical temperature at which all thermal motion ceases. One kelvin is equal in magnitude to a change of one degree Celsius. The Kelvin scale is widely used in scientific applications, particularly in physics, chemistry, and engineering, where absolute temperatures are essential for calculations involving thermodynamics, kinetics, and materials properties. Its use eliminates the need for negative temperatures and provides a consistent reference point for temperature-dependent phenomena. The Kelvin scale is also employed in color temperature measurements for lighting, with higher kelvin values corresponding to cooler, bluer colors and lower values indicating warmer, more yellow tones. In astronomy, the Kelvin scale is used to describe the surface temperatures of stars, planets, and other celestial objects. The Kelvin scale's importance lies in its fundamental role in understanding and quantifying thermal energy, heat transfer, and the behavior of matter at various temperatures, making it an indispensable tool in scientific research and technological applications.

temperature, thermodynamics, absolute zero, celsius, fahrenheit, color temperature, astronomy, physics

— John Armstrong

CITATION : "John Armstrong. 'Kelvin.' Design+Encyclopedia. https://design-encyclopedia.com/define/kelvin?E=432391 (Accessed on October 14, 2026)"