Blackbody radiation(黑体辐射) Blackbody is a body that would absorb all the radiation falling on it Radiation intensity of blackbody (单色辐出度) Energy of electromagnetic waves of wavelength from 入to入+d入by unit surface e(2,T)= dE of blackbody in unit time dλ interval.Blackbody radiation(黑体辐射） Blackbody is a body that would absorb all the radiation falling on it Radiation intensity of blackbody （单色辐出度） Energy of electromagnetic waves of wavelength from  to +d by unit surface of blackbody in unit time interval