What is 1℃ K?

Kelvin = Celsius +273.438+05.

Kelvin is a thermodynamic temperature scale or absolute temperature scale, and it is the degree-day in the international system of units. Kelvin temperature is often expressed by the symbol k, and its unit is open.

Every change of 1K is equivalent to the change of 1℃, and the calculation starting point is different. Celsius is based on the temperature of ice-water mixture, while Kelvin is based on absolute zero, that is, -273.438+05℃ = 0k. Kelvin used to be called absolute temperature.

Extended data

Kelvin is usually used to measure the color temperature of a light source. The color temperature is based on the principle that the color of the light emitted by the black body depends on the temperature of the radiator. The blackbody with temperature below 4000 K is light red, and the blackbody with temperature above 7500 K is light blue.

Color temperature is very important in the field of projection and photography, and the color temperature around 5600 K needs to match the "daylight" film. In the field of astronomy, the spectra of stars and their positions in the Herotto diagram depend in part on their surface temperatures, which are called effective temperatures. For example, the effective temperature of the solar photosphere is 5778 K.

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