a) spectral radiancy(单色辐出度) The quantity Map is the rate at which energy is radiated per unit time, per unit wavelength and per unit area of surface for wavelengths lying in the intervalλto+d入 at the temperature T 总 dM,(wm) (元.T) 黑体 显然,它是波长和温度的函数 b) radiancy (辐出度) The appropriate quantity Mon is the rate at which energy is radiated per unit time and per unit area of surface at the temperature T.a）spectral radiancy (单色辐出度) The quantity M(T) is the rate at which energy is radiated per unit time, per unit wavelength and per unit area of surface for wavelengths lying in the interval  to +d at the temperature T. 黑体    d dM M( .T ) = ( . ) −3 a W m 总=1 显然，它是波长和温度的函数 b) radiancy (辐出度) The appropriate quantity M(T) is the rate at which energy is radiated per unit time and per unit area of surface at the temperature T. dM d