A greater amount of infrared radiation implies a larger amount of cooler material surrounding the star, which indicates that it is still coalescing. 红外线辐射越是强烈，表示星体周遭有越多温度较低的物质，也就是说这个星体还在形成阶段的初期。
Radiative forcing is defined as a change in average net radiation at the top of the troposphere tropopause due to a change in either solar or infrared radiation. 辐射力的定义是由于太阳或红外线辐射份量的转变而引致对流层顶部的平均辐射改变。
