Par accord international, une valeur de 273,16 K (0,01 ° C; 32,02 ° F) et une pression de vapeur partielle de 611,66 pascals (6,166 mbar; 0,0060366 atm) ont été attribués au triple point d’eau . Kelvin is a temperature scale designed so that zero degrees K is defined as absolute zero (at absolute zero, a hypothetical temperature, all molecular movement stops - all actual temperatures are above absolute zero) and the size of one unit is the same as the size of one degree Celsius. The kelvin is now defined by fixing the numerical value of the Boltzmann constant k to 1.380 649×10 −23 J⋅K −1.This unit is equal to kg⋅m 2 ⋅s −2 ⋅K −1, where the kilogram, metre and second are defined in terms of the Planck constant, the speed of light, and the duration of the caesium-133 ground-state hyperfine transition respectively. Water freezes at 273.16K; water boils at 373.16K. This change in definition acknowledges that temperature is fundamentally a measure of the average energy of molecular motion. At 0K there is no movement at the molecular level. Kelvin definition, English physicist and mathematician. Colour temperature is a characteristic of visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, and other fields. See more. Kelvin Scale - Kelvin scale is a temperature scale that has no negative values. Its lower fixed point is absolute zero. In daily life, the Kelvin temperature scale — named for the celebrated British physicist Lord Kelvin (1824–1907) — … Le kelvin est défini comme la fraction 1⁄273,16 de la température thermodynamique du point triple de l’eau. The kelvin (K) — the SI unit of temperature — now has a radically new definition. [ K = C + 273.16°, F = (9/5)C + 32°]. Definition of Kelvin. It is measured in degrees on a Kelvin scale (K) and typically ranges from 2700 – 5000 degrees Kelvin. Absolute zero, or 0°K, is the temperature at which molecular energy is a minimum, and it corresponds to a temperature of −273.15° on the Celsius temperature scale. The size of the unit, the kelvin, is the same as the degree Celsius, and the triple point of water is 273.16 K. The thermodynamic temperature kelvin Kelvin (old degree Kelvin) is defined based on 2 factors, Zero corresponds to absolute zero, which is the lowest temperature that can be achieved. The Kelvin temperature scale was the brainchild of Belfast-born British inventor and scientist William Thomson — also known as Lord Kelvin. Kelvin Color Temperature Scale Explained The Kelvin color temperature scale is used to describe the way various light temperatures appear visually. . Kelvin temperature scale, a temperature scale having an absolute zero below which temperatures do not exist. A K is exactly 1 / 273.16 of the thermodynamic temperature of the triple point of water. 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