Explain the absolute temperature scale.

(N/A) Absolute zero temperature: The temperature $-273.15^{\circ}C$ (approximately $-273^{\circ}C$) is defined as absolute zero temperature.
It is denoted by $T$ and its unit is $K$ (Kelvin). The degree symbol $(^{\circ})$ is not used with Kelvin.
Absolute temperature in Kelvin is calculated as: $T(K) = 273.15 + t(^{\circ}C)$.
For simplicity,it is often written as: $T(K) = 273 + t(^{\circ}C)$.
Definition: The scale of temperature starting from absolute zero is called the Kelvin scale of temperature or the thermodynamic scale.